{"id":1961,"date":"2025-08-19T03:11:07","date_gmt":"2025-08-19T03:11:07","guid":{"rendered":"https:\/\/nbaem.com\/?p=1961"},"modified":"2025-08-20T06:06:04","modified_gmt":"2025-08-20T06:06:04","slug":"can-magnet-rust","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/can-magnet-rust\/","title":{"rendered":"Nam ch\u00e2m c\u00f3 b\u1ecb g\u1ec9 kh\u00f4ng? C\u00e1ch ph\u00f2ng ng\u1eeba v\u00e0 b\u1ea3o v\u1ec7 ch\u00fang"},"content":{"rendered":"<p>C\u00f3 th\u1ec3 <strong>nam ch\u00e2m b\u1ecb r\u1ec9 s\u00e9t<\/strong>? C\u00e2u tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn l\u00e0 c\u00f3\u2014<strong>m\u1ed9t s\u1ed1 nam ch\u00e2m c\u00f3 th\u1ec3 b\u1ecb \u0103n m\u00f2n<\/strong> theo th\u1eddi gian, v\u00e0 \u0111i\u1ec1u \u0111\u00f3 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn \u0111\u1ed9 m\u1ea1nh v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a ch\u00fang. D\u00f9 b\u1ea1n \u0111ang s\u1eed d\u1ee5ng <strong>nam ch\u00e2m neodymium<\/strong> trong c\u00e1c d\u1ef1 \u00e1n DIY ho\u1eb7c <strong>nam ch\u00e2m c\u00f4ng nghi\u1ec7p<\/strong> trong m\u00e1y m\u00f3c, hi\u1ec3u r\u00f5 c\u00e1ch v\u00e0 l\u00fd do t\u1ea1i sao r\u1ec9 s\u00e9t x\u1ea3y ra l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 b\u1ea3o v\u1ec7 kho\u1ea3n \u0111\u1ea7u t\u01b0 c\u1ee7a b\u1ea1n. Trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd h\u1ecdc ch\u00ednh x\u00e1c <strong>c\u00e1c lo\u1ea1i nam ch\u00e2m d\u1ec5 b\u1ecb r\u1ec9 s\u00e9t<\/strong>, nguy\u00ean nh\u00e2n g\u00e2y ra n\u00f3, v\u00e0 nh\u1eefng c\u00e1ch th\u00f4ng minh nh\u1ea5t \u0111\u1ec3 <strong>ng\u0103n ch\u1eb7n \u0103n m\u00f2n nam ch\u00e2m<\/strong> tr\u01b0\u1edbc khi n\u00f3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t. H\u00e3y b\u1eaft \u0111\u1ea7u ngay th\u00f4i.<\/p>\n<h2>Rust l\u00e0 g\u00ec v\u00e0 Hi\u1ec3u v\u1ec1 qu\u00e1 tr\u00ecnh \u0103n m\u00f2n<\/h2>\n<p>R\u1ec9 s\u00e9t l\u00e0 m\u1ed9t d\u1ea1ng \u0103n m\u00f2n ph\u1ed5 bi\u1ebfn x\u1ea3y ra khi s\u1eaft ho\u1eb7c kim lo\u1ea1i d\u1ef1a tr\u00ean s\u1eaft ph\u1ea3n \u1ee9ng v\u1edbi oxy v\u00e0 \u0111\u1ed9 \u1ea9m. Qu\u00e1 tr\u00ecnh n\u00e0y, g\u1ecdi l\u00e0 <strong>oxy h\u00f3a<\/strong>, t\u1ea1o ra m\u1ed9t ch\u1ea5t r\u1ec9 m\u00e0u n\u00e2u \u0111\u1ecf, d\u1ec5 bong tr\u00f3c g\u1ecdi l\u00e0 s\u1eaft oxit. Trong khi r\u1ec9 s\u00e9t \u0111\u1eb7c tr\u01b0ng cho s\u1eaft, c\u00e1c nam ch\u00e2m l\u00e0m b\u1eb1ng th\u00e0nh ph\u1ea7n s\u1eaft ho\u1eb7c th\u00e9p c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c qu\u00e1 tr\u00ecnh \u0103n m\u00f2n t\u01b0\u01a1ng t\u1ef1.<\/p>\n<h3>C\u00e1c lo\u1ea1i \u0103n m\u00f2n c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nam ch\u00e2m<\/h3>\n<p>Nam ch\u00e2m c\u00f3 th\u1ec3 g\u1eb7p nhi\u1ec1u d\u1ea1ng h\u01b0 h\u1ecfng b\u1ec1 m\u1eb7t t\u00f9y thu\u1ed9c v\u00e0o v\u1eadt li\u1ec7u v\u00e0 m\u00f4i tr\u01b0\u1eddng c\u1ee7a ch\u00fang:<\/p>\n<ul>\n<li><strong>R\u1ec9 s\u00e9t (S\u1eaft oxit):<\/strong> X\u1ea3y ra \u1edf c\u00e1c nam ch\u00e2m ch\u1ee9a s\u1eaft, nh\u01b0 lo\u1ea1i neodymium ho\u1eb7c ferrite.<\/li>\n<li><strong>X\u1ec9n m\u00e0u:<\/strong> M\u1ed9t l\u1edbp m\u1ecfng tr\u00ean b\u1ec1 m\u1eb7t thay \u0111\u1ed5i m\u00e0u s\u1eafc nh\u01b0ng kh\u00f4ng l\u00e0m y\u1ebfu c\u1ea5u tr\u00fac \u0111\u00e1ng k\u1ec3; ph\u1ed5 bi\u1ebfn h\u01a1n trong m\u1ed9t s\u1ed1 l\u1edbp ph\u1ee7 kim lo\u1ea1i.<\/li>\n<li><strong>\u0102n m\u00f2n chung:<\/strong> S\u1ef1 ph\u00e2n h\u1ee7y kim lo\u1ea1i r\u1ed9ng h\u01a1n c\u00f3 th\u1ec3 l\u00e0m y\u1ebfu c\u1ea3 c\u1ea5u tr\u00fac v\u00e0 hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh.<\/li>\n<\/ul>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh \u0103n m\u00f2n<\/h3>\n<p>\u0102n m\u00f2n c\u1ea7n \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111\u1ecbnh \u0111\u1ec3 b\u1eaft \u0111\u1ea7u v\u00e0 lan r\u1ed9ng. C\u00e1c y\u1ebfu t\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ea5t bao g\u1ed3m:<\/p>\n<table>\n<thead>\n<tr>\n<th>Y\u1ebfu t\u1ed1<\/th>\n<th>\u1ea2nh h\u01b0\u1edfng c\u1ee7a \u0103n m\u00f2n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u0110\u1ed9 \u1ea9m<\/strong><\/td>\n<td>Th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh oxy h\u00f3a b\u1eb1ng c\u00e1ch cung c\u1ea5p n\u01b0\u1edbc cho ph\u1ea3n \u1ee9ng.<\/td>\n<\/tr>\n<tr>\n<td><strong>Oxy<\/strong><\/td>\n<td>K\u1ebft h\u1ee3p v\u1edbi c\u00e1c nguy\u00ean t\u1eed s\u1eaft \u0111\u1ec3 t\u1ea1o th\u00e0nh g\u1ec9 s\u00e9t.<\/td>\n<\/tr>\n<tr>\n<td><strong>Mu\u1ed1i<\/strong><\/td>\n<td>M\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc mu\u1ed1i, nh\u01b0 khu v\u1ef1c ven bi\u1ec3n, l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 \u0103n m\u00f2n \u0111\u00e1ng k\u1ec3 b\u1eb1ng c\u00e1ch t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n c\u1ee7a n\u01b0\u1edbc.<\/td>\n<\/tr>\n<tr>\n<td><strong>H\u00f3a ch\u1ea5t<\/strong><\/td>\n<td>Axit ho\u1eb7c h\u01a1i c\u00f4ng nghi\u1ec7p c\u00f3 th\u1ec3 t\u1ea5n c\u00f4ng l\u1edbp ph\u1ee7 nam ch\u00e2m v\u00e0 l\u00e0m l\u1ed9 s\u1eaft ra ngo\u00e0i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>T\u00f3m l\u1ea1i, qu\u00e1 tr\u00ecnh \u0103n m\u00f2n x\u1ea3y ra khi v\u1eadt li\u1ec7u, m\u00f4i tr\u01b0\u1eddng v\u00e0 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c ch\u1ea5t \u0111i\u1ec7n ly nh\u01b0 mu\u1ed1i ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 ph\u00e1 v\u1ee1 b\u1ec1 m\u1eb7t kim lo\u1ea1i \u2014 \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nam ch\u00e2m n\u1ebfu ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 \u0111\u00fang c\u00e1ch.<\/p>\n<h2>C\u00e1c lo\u1ea1i nam ch\u00e2m v\u00e0 m\u1ee9c \u0111\u1ed9 d\u1ec5 b\u1ecb r\u1ec9 s\u00e9t c\u1ee7a ch\u00fang<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Magnet_types_and_rust_prevention_uFbnEWd3R.webp\" alt=\"C\u00e1c lo\u1ea1i nam ch\u00e2m v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u1ed1ng r\u1ec9 s\u00e9t\" \/><\/p>\n<p>Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i nam ch\u00e2m \u0111\u1ec1u b\u1ecb g\u1ec9 theo c\u00f9ng m\u1ed9t c\u00e1ch. Y\u1ebfu t\u1ed1 ch\u00ednh l\u00e0 li\u1ec7u v\u1eadt li\u1ec7u c\u1ee7a nam ch\u00e2m c\u00f3 ch\u1ee9a s\u1eaft ho\u1eb7c h\u1ee3p kim d\u1ef1a tr\u00ean s\u1eaft hay kh\u00f4ng, v\u00ec s\u1eaft l\u00e0 nguy\u00ean t\u1ed1 d\u1ec5 oxy h\u00f3a v\u00e0 g\u00e2y g\u1ec9. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 t\u00f3m t\u1eaft nhanh c\u00e1c lo\u1ea1i nam ch\u00e2m ph\u1ed5 bi\u1ebfn v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a ch\u00fang:<\/p>\n<p><strong>Nam ch\u00e2m Ferrite (G\u1ed1m)<\/strong><\/p>\n<ul>\n<li>Ch\u1ee7 y\u1ebfu l\u00e0m t\u1eeb oxit s\u1eaft pha tr\u1ed9n v\u1edbi v\u1eadt li\u1ec7u g\u1ed1m<\/li>\n<li>C\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u1ea9m t\u1ed1t h\u01a1n so v\u1edbi nam ch\u00e2m kim lo\u1ea1i nguy\u00ean ch\u1ea5t, nh\u01b0ng v\u1eabn ch\u1ee9a s\u1eaft v\u00e0 c\u00f3 th\u1ec3 b\u1ecb \u0103n m\u00f2n khi ti\u1ebfp x\u00fac l\u00e2u d\u00e0i v\u1edbi n\u01b0\u1edbc ho\u1eb7c mu\u1ed1i<\/li>\n<\/ul>\n<p><strong>Nam ch\u00e2m Neodymium (NdFeB)<\/strong><\/p>\n<ul>\n<li>C\u1ef1c k\u1ef3 m\u1ea1nh nh\u01b0ng ch\u1ee9a nhi\u1ec1u s\u1eaft<\/li>\n<li>R\u1ea5t d\u1ec5 b\u1ecb g\u1ec9 n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7 ho\u1eb7c n\u1ebfu l\u1edbp ph\u1ee7 b\u1ecb h\u1ecfng<\/li>\n<li>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c m\u1ea1 b\u1eb1ng <strong>nickel, k\u1ebdm ho\u1eb7c epoxy<\/strong> \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u00fang<\/li>\n<\/ul>\n<p><strong>Nam Ch\u00e2m Alnico<\/strong><\/p>\n<ul>\n<li>Ch\u1ebf t\u1ea1o t\u1eeb nh\u00f4m, nickel v\u00e0 cobalt, c\u00f3 m\u1ed9t s\u1ed1 h\u00e0m l\u01b0\u1ee3ng s\u1eaft<\/li>\n<li>Ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t h\u01a1n neodymium, nh\u01b0ng v\u1eabn kh\u00f4ng mi\u1ec5n nhi\u1ec5m trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t<\/li>\n<\/ul>\n<p><strong>Nam Ch\u00e2m Cobalt Samarium<\/strong><\/p>\n<ul>\n<li>H\u00e0m l\u01b0\u1ee3ng s\u1eaft th\u1ea5p, r\u1ea5t ch\u1ed1ng \u0103n m\u00f2n<\/li>\n<li>C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e0 kh\u00f4ng c\u1ea7n l\u1edbp ph\u1ee7 trong h\u1ea7u h\u1ebft c\u00e1c m\u00f4i tr\u01b0\u1eddng<\/li>\n<\/ul>\n<p><strong>C\u00e1c l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 ph\u1ed5 bi\u1ebfn cho nam ch\u00e2m<\/strong><\/p>\n<ul>\n<li><strong>Ph\u1ee7 Nickel<\/strong>: Mang l\u1ea1i l\u1edbp ho\u00e0n thi\u1ec7n b\u00f3ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 t\u1ed1t<\/li>\n<li><strong>L\u1edbp ph\u1ee7 Epoxy<\/strong>: Th\u00edch h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng ngo\u00e0i tr\u1eddi, h\u00e0ng h\u1ea3i ho\u1eb7c \u1ea9m \u01b0\u1edbt<\/li>\n<li><strong>L\u1edbp ph\u1ee7 Zinc<\/strong>: B\u1ea3o v\u1ec7 r\u1ebb ti\u1ec1n, nh\u01b0ng m\u00f2n nhanh h\u01a1n nickel<\/li>\n<li><strong>L\u1edbp ph\u1ee7 nh\u1ef1a ho\u1eb7c cao su<\/strong>: T\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp c\u00f9ng v\u1edbi ng\u0103n ng\u1eeba g\u1ec9 s\u00e9t<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, c\u00e1c nam ch\u00e2m c\u00f3 h\u00e0m l\u01b0\u1ee3ng s\u1eaft cao nh\u01b0 ferrite v\u00e0 neodymium c\u1ea7n l\u1edbp ph\u1ee7 \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 tr\u00e1nh g\u1ec9, trong khi samarium cobalt v\u00e0 m\u1ed9t s\u1ed1 nam ch\u00e2m alnico c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t t\u1ed1t h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n l\u1edbp b\u1ea3o v\u1ec7 b\u1ed5 sung.<\/p>\n<h2>T\u1ea1i sao nam ch\u00e2m b\u1ecb r\u1ec9 s\u00e9t<\/h2>\n<p>Nam ch\u00e2m b\u1ecb g\u1ec9 v\u00ec l\u00fd do t\u01b0\u01a1ng t\u1ef1 nh\u01b0 b\u1ea5t k\u1ef3 v\u1eadt li\u1ec7u d\u1ef1a tr\u00ean s\u1eaft n\u00e0o \u2014 ch\u00fang ch\u1ee9a s\u1eaft ph\u1ea3n \u1ee9ng v\u1edbi oxy v\u00e0 \u0111\u1ed9 \u1ea9m trong kh\u00f4ng kh\u00ed. Khi x\u1ea3y ra \u0111i\u1ec1u n\u00e0y, oxit s\u1eaft (g\u1ec9) h\u00ecnh th\u00e0nh tr\u00ean b\u1ec1 m\u1eb7t. Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i nam ch\u00e2m \u0111\u1ec1u c\u00f3 c\u1ea5u t\u1ea1o gi\u1ed1ng nhau, nh\u01b0ng c\u00e1c lo\u1ea1i nh\u01b0 <strong>neodymi (NdFeB)<\/strong> v\u00e0 ferrite c\u00f3 \u0111\u1ee7 s\u1eaft trong ch\u00fang \u0111\u1ec3 d\u1ec5 b\u1ecb \u0103n m\u00f2n n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7.<\/p>\n<p>\u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng \u0111\u00f3ng vai tr\u00f2 r\u1ea5t l\u1edbn. <strong>\u0110\u1ed9 \u1ea9m cao, ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc, n\u01b0\u1edbc mu\u1ed1i v\u00e0 m\u00f4i tr\u01b0\u1eddng axit<\/strong> th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh g\u1ec9. N\u01b0\u1edbc mu\u1ed1i \u0111\u1eb7c bi\u1ec7t kh\u1eafc nghi\u1ec7t v\u00ec mu\u1ed1i ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ch\u1ea5t \u0111i\u1ec7n gi\u1ea3i, l\u00e0m cho qu\u00e1 tr\u00ecnh oxy h\u00f3a d\u1ec5 x\u1ea3y ra h\u01a1n. Ngay c\u1ea3 ti\u1ebfp x\u00fac ng\u1eafn trong khu v\u1ef1c \u1ea9m \u01b0\u1edbt ho\u1eb7c ven bi\u1ec3n c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra nh\u1eefng thay \u0111\u1ed5i r\u00f5 r\u1ec7t tr\u00ean nam ch\u00e2m kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7.<\/p>\n<p>H\u1ea7u h\u1ebft c\u00e1c nam ch\u00e2m d\u00f9ng cho m\u1ee5c \u0111\u00edch th\u00f4ng th\u01b0\u1eddng \u0111\u1ec1u \u0111\u01b0\u1ee3c ph\u1ee7 b\u1eb1ng c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 <strong>nickel, k\u1ebdm, epoxy ho\u1eb7c nh\u1ef1a<\/strong> \u0111\u1ec3 ng\u0103n ch\u1eb7n \u0111\u1ed9 \u1ea9m v\u00e0 oxy. Nh\u1eefng l\u1edbp ph\u1ee7 n\u00e0y ho\u1ea1t \u0111\u1ed9ng t\u1ed1t, nh\u01b0ng khi ch\u00fang b\u1ecb bong tr\u00f3c, n\u1ee9t ho\u1eb7c m\u00f2n, c\u00e1c khu v\u1ef1c l\u1ed9 ra s\u1ebd b\u1eaft \u0111\u1ea7u g\u1ec9 nhanh ch\u00f3ng. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c b\u1ec1 m\u1eb7t nam ch\u00e2m b\u1ecb h\u01b0 h\u1ecfng c\u1ea7n \u0111\u01b0\u1ee3c s\u1eeda ch\u1eefa ho\u1eb7c thay th\u1ebf tr\u01b0\u1edbc khi qu\u00e1 tr\u00ecnh \u0103n m\u00f2n lan r\u1ed9ng v\u00e0 l\u00e0m y\u1ebfu nam ch\u00e2m.<\/p>\n<h2>D\u1ea5u hi\u1ec7u cho th\u1ea5y nam ch\u00e2m c\u1ee7a b\u1ea1n \u0111ang b\u1ecb r\u1ec9 s\u00e9t ho\u1eb7c \u0103n m\u00f2n<\/h2>\n<p>R\u1ea5t d\u1ec5 nh\u1eadn bi\u1ebft khi m\u1ed9t nam ch\u00e2m b\u1eaft \u0111\u1ea7u g\u1ec9 n\u1ebfu b\u1ea1n bi\u1ebft nh\u1eefng d\u1ea5u hi\u1ec7u c\u1ea7n ch\u00fa \u00fd. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 d\u1ea5u hi\u1ec7u ph\u1ed5 bi\u1ebfn:<\/p>\n<p><strong>D\u1ea5u hi\u1ec7u tr\u1ef1c quan:<\/strong><\/p>\n<ul>\n<li><strong>S\u1ef1 bi\u1ebfn \u0111\u1ed5i m\u00e0u s\u1eafc<\/strong> \u2013 R\u1ec9 s\u00e9t th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng c\u00e1c v\u1ebft n\u00e2u \u0111\u1ecf, nh\u01b0ng c\u0169ng c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n m\u00e0u v\u00e0ng, cam ho\u1eb7c n\u00e2u \u0111\u1eadm.<\/li>\n<li><strong>Bong tr\u00f3c ho\u1eb7c ph\u1ed3ng r\u1ed9p<\/strong> \u2013 B\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u bong tr\u00f3c, \u0111\u1eb7c bi\u1ec7t n\u1ebfu l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 b\u1ecb h\u01b0 h\u1ecfng.<\/li>\n<li><strong>K\u1ebft c\u1ea5u th\u00f4 r\u00e1p<\/strong> \u2013 S\u1ef1 \u0103n m\u00f2n c\u00f3 th\u1ec3 \u0103n v\u00e0o kim lo\u1ea1i, \u0111\u1ec3 l\u1ea1i c\u00e1c v\u1ebft r\u1ed7 ho\u1eb7c kh\u00f4ng \u0111\u1ec1u.<\/li>\n<\/ul>\n<p><strong>Thay \u0111\u1ed5i hi\u1ec7u su\u1ea5t:<\/strong><\/p>\n<ul>\n<li><strong>S\u1ee9c k\u00e9o y\u1ebfu \u0111i<\/strong> \u2013 R\u1ec9 s\u00e9t c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a nam ch\u00e2m, gi\u1ea3m s\u1ee9c gi\u1eef ch\u1eb7t c\u1ee7a n\u00f3.<\/li>\n<li><strong>C\u1ea5u tr\u00fac gi\u00f2n<\/strong> \u2013 S\u1ef1 \u0103n m\u00f2n nghi\u00eam tr\u1ecdng c\u00f3 th\u1ec3 khi\u1ebfn nam ch\u00e2m, \u0111\u1eb7c bi\u1ec7t l\u00e0 nam ch\u00e2m neodymium, b\u1ecb n\u1ee9t ho\u1eb7c v\u1ee1 ra.<\/li>\n<\/ul>\n<p><strong>C\u00e1ch ki\u1ec3m tra s\u1edbm s\u1ef1 \u0103n m\u00f2n:<\/strong><\/p>\n<ul>\n<li>Gi\u1eef cho nam ch\u00e2m s\u1ea1ch v\u00e0 kh\u00f4 r\u00e1o \u0111\u1ec3 c\u00e1c thay \u0111\u1ed5i d\u1ec5 nh\u1eadn bi\u1ebft.<\/li>\n<li>Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 c\u00e1c v\u1ebft tr\u1ea7y x\u01b0\u1edbc ho\u1eb7c s\u1ee9t m\u1ebb l\u1edbp ph\u1ee7\u2014\u0111\u00e2y l\u00e0 c\u00e1c \u0111i\u1ec3m th\u01b0\u1eddng xuy\u00ean ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m.<\/li>\n<li>Ch\u00fa \u00fd \u0111\u1eb7c bi\u1ec7t \u0111\u1ebfn c\u00e1c nam ch\u00e2m \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef ho\u1eb7c s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi, g\u1ea7n n\u01b0\u1edbc ho\u1eb7c trong \u0111i\u1ec1u ki\u1ec7n \u1ea9m \u01b0\u1edbt.<\/li>\n<\/ul>\n<p>Ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c v\u1ea5n \u0111\u1ec1 n\u00e0y c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n tr\u00e1nh h\u1ecfng ho\u00e0n to\u00e0n nam ch\u00e2m, \u0111\u1eb7c bi\u1ec7t n\u1ebfu b\u1ea1n d\u1ef1a v\u00e0o ch\u00fang trong c\u00e1c c\u00f4ng c\u1ee5, thi\u1ebft b\u1ecb ho\u1eb7c h\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p.<\/p>\n<h2>R\u1ec9 s\u00e9t c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m kh\u00f4ng<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/rust_impact_on_magnet_performance_EtzTScPJw.webp\" alt=\"\u1ea2nh h\u01b0\u1edfng c\u1ee7a r\u1ec9 s\u00e9t \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m\" \/><\/p>\n<p>R\u1ec9 s\u00e9t ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 g\u00e2y h\u1ea1i cho hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m. Khi s\u1ef1 \u0103n m\u00f2n b\u1eaft \u0111\u1ea7u, n\u00f3 kh\u00f4ng ch\u1ec9 l\u00e0m thay \u0111\u1ed5i v\u1ebb ngo\u00e0i c\u1ee7a nam ch\u00e2m\u2014m\u00e0 c\u00f2n \u0103n v\u00e0o ch\u00ednh v\u1eadt li\u1ec7u. \u0110\u1ed1i v\u1edbi c\u00e1c nam ch\u00e2m ch\u1ee9a s\u1eaft, r\u1ec9 s\u00e9t m\u1edf r\u1ed9ng khi h\u00ecnh th\u00e0nh, c\u00f3 th\u1ec3 g\u00e2y ra <strong>v\u1ebft r\u1ed7 tr\u00ean b\u1ec1 m\u1eb7t, n\u1ee9t ho\u1eb7c bong tr\u00f3c<\/strong>Theo th\u1eddi gian, nam ch\u00e2m c\u00f3 th\u1ec3 m\u1ea5t kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ea5u tr\u00fac.<\/p>\n<p>T\u1eeb tr\u01b0\u1eddng t\u1eeb t\u00ednh c\u00f3 th\u1ec3 y\u1ebfu \u0111i n\u1ebfu r\u1ec9 s\u00e9t l\u00e0m h\u01b0 h\u1ecfng \u0111\u1ee7 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a nam ch\u00e2m ho\u1eb7c l\u00e0m cho c\u00e1c ph\u1ea7n b\u1ecb g\u00e3y r\u1eddi. S\u1ef1 b\u00e1m d\u00ednh c\u0169ng b\u1ecb \u1ea3nh h\u01b0\u1edfng\u2014\u0111\u1eb7c bi\u1ec7t v\u1edbi nam ch\u00e2m ph\u1eb3ng ho\u1eb7c d\u1ea1ng \u0111\u0129a\u2014b\u1edfi v\u00ec b\u1ec1 m\u1eb7t g\u1ed3 gh\u1ec1, b\u1ecb \u0103n m\u00f2n kh\u00f4ng c\u00f2n gi\u1eef ch\u1eb7t c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac kim lo\u1ea1i t\u1ed1t n\u1eefa.<\/p>\n<p>B\u1ea1n th\u01b0\u1eddng s\u1ebd nh\u1eadn th\u1ea5y s\u1ef1 gi\u1ea3m hi\u1ec7u su\u1ea5t nghi\u00eam tr\u1ecdng khi:<\/p>\n<ul>\n<li>L\u1edbp ph\u1ee7 c\u1ee7a nam ch\u00e2m b\u1ecb m\u00f2n ho\u1eb7c bong tr\u00f3c n\u1eb7ng.<\/li>\n<li>C\u00f3 r\u1ec9 s\u00e9t s\u00e2u ho\u1eb7c ph\u1ea7n v\u1eadt li\u1ec7u b\u1ecb v\u1ee1 v\u1ee5n r\u00f5 r\u00e0ng.<\/li>\n<li>Nam ch\u00e2m b\u1eaft \u0111\u1ea7u b\u1ecb s\u1ee9t m\u1ebb khi d\u00f9ng l\u1ef1c nh\u1eb9.<\/li>\n<\/ul>\n<p>Khi qu\u00e1 tr\u00ecnh \u0103n m\u00f2n \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c \u0111\u00f3, vi\u1ec7c l\u00e0m s\u1ea1ch s\u1ebd kh\u00f4ng kh\u00f4i ph\u1ee5c l\u1ea1i s\u1ee9c m\u1ea1nh ban \u0111\u1ea7u c\u1ee7a nam ch\u00e2m. Trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p, <strong>thay th\u1ebf l\u00e0 l\u1ef1a ch\u1ecdn an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n<\/strong>, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 tin c\u1eady cao\u2014nh\u01b0 m\u00e1y m\u00f3c, d\u1ee5ng c\u1ee5 ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb gi\u1eef ch\u1eb7t.<\/p>\n<h2>C\u00e1ch ng\u0103n ch\u1eb7n nam ch\u00e2m b\u1ecb r\u1ec9 s\u00e9t<\/h2>\n<p>Gi\u1eef cho nam ch\u00e2m lu\u00f4n trong t\u00ecnh tr\u1ea1ng t\u1ed1t kh\u00f4ng kh\u00f3 n\u1ebfu b\u1ea1n bi\u1ebft c\u00e1ch ch\u00fa \u00fd. R\u1ec9 s\u00e9t x\u1ea3y ra khi \u0111\u1ed9 \u1ea9m, oxy, v\u00e0 s\u1eaft g\u1eb7p nhau \u2014 v\u00ec v\u1eady m\u1ee5c ti\u00eau l\u00e0 h\u1ea1n ch\u1ebf ti\u1ebfp x\u00fac v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00f3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng c\u00e1ch hi\u1ec7u qu\u1ea3:<\/p>\n<h3>L\u01b0u tr\u1eef trong m\u00f4i tr\u01b0\u1eddng ph\u00f9 h\u1ee3p<\/h3>\n<ul>\n<li><strong>Gi\u1eef ch\u00fang kh\u00f4 r\u00e1o<\/strong> \u2013 N\u01a1i s\u1ea1ch s\u1ebd, \u0111\u1ed9 \u1ea9m th\u1ea5p l\u00e0 t\u1ed1t nh\u1ea5t.<\/li>\n<li><strong>Tr\u00e1nh dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9<\/strong> \u2013 Thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t c\u00f3 th\u1ec3 g\u00e2y ng\u01b0ng t\u1ee5, l\u00e0m t\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh \u0103n m\u00f2n.<\/li>\n<li><strong>S\u1eed d\u1ee5ng h\u1ed9p ho\u1eb7c t\u00fai k\u00edn<\/strong> \u0111\u1ec3 l\u01b0u tr\u1eef l\u00e2u d\u00e0i, \u0111\u1eb7c bi\u1ec7t g\u1ea7n n\u01b0\u1edbc.<\/li>\n<\/ul>\n<h3>Ch\u1ecdn l\u1edbp ph\u1ee7 ph\u00f9 h\u1ee3p<\/h3>\n<p>\u0110\u1ed1i v\u1edbi nam ch\u00e2m d\u00f9ng \u1edf nh\u1eefng n\u01a1i kh\u1eafc nghi\u1ec7t h\u01a1n nh\u01b0 ngo\u00e0i tr\u1eddi ho\u1eb7c g\u1ea7n n\u01b0\u1edbc:<\/p>\n<ul>\n<li><strong>Ch\u1ecdn nam ch\u00e2m ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7<\/strong> \u2013 L\u1edbp ph\u1ee7 b\u1eb1ng Nickel, epoxy, k\u1ebdm ho\u1eb7c nh\u1ef1a gi\u00fap ng\u0103n ch\u1eb7n \u0111\u1ed9 \u1ea9m.<\/li>\n<li><strong>NBAEM cung c\u1ea5p c\u00e1c t\u00f9y ch\u1ecdn ni\u00eam phong v\u00e0 ph\u1ee7 l\u1edbp t\u00f9y ch\u1ec9nh<\/strong> \u0111\u1ec3 nam ch\u00e2m c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n h\u00e0ng h\u1ea3i, h\u00f3a ch\u1ea5t ho\u1eb7c c\u00f4ng nghi\u1ec7p.<\/li>\n<\/ul>\n<h3>V\u1ec7 sinh v\u00e0 b\u1ea3o tr\u00ec<\/h3>\n<ul>\n<li>L\u00e0m s\u1ea1ch nam ch\u00e2m b\u1eb1ng kh\u0103n m\u1ec1m, kh\u00f4 tr\u01b0\u1edbc khi l\u01b0u tr\u1eef.<\/li>\n<li>N\u1ebfu b\u1ee5i b\u1ea9n ho\u1eb7c d\u1ea7u m\u1ee1 t\u00edch t\u1ee5, s\u1eed d\u1ee5ng x\u00e0 ph\u00f2ng nh\u1eb9 v\u00e0 n\u01b0\u1edbc, sau \u0111\u00f3 lau kh\u00f4 ngay l\u1eadp t\u1ee9c.<\/li>\n<li>Kh\u00f4ng bao gi\u1edd s\u1eed d\u1ee5ng axit m\u1ea1nh ho\u1eb7c ki\u1ec1m m\u1ea1nh \u2014 ch\u00fang c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7.<\/li>\n<\/ul>\n<h3>Tr\u00e1nh ti\u1ebfp x\u00fac nguy c\u01a1 cao<\/h3>\n<ul>\n<li>B\u1ecf qua vi\u1ec7c ti\u1ebfp x\u00fac l\u00e2u d\u00e0i v\u1edbi <strong>n\u01b0\u1edbc, n\u01b0\u1edbc mu\u1ed1i, h\u00f3a ch\u1ea5t v\u00e0 axit<\/strong>.<\/li>\n<li>Trong c\u00e1c x\u01b0\u1edfng ho\u1eb7c gara, gi\u1eef nam ch\u00e2m tr\u00e1nh xa c\u00e1c ch\u1ea5t t\u1ea9y r\u1eeda \u0103n m\u00f2n ho\u1eb7c m\u1ea3nh kim lo\u1ea1i g\u00e2y gi\u1eef \u1ea9m.<\/li>\n<\/ul>\n<h3>M\u1eb9o chuy\u00ean nghi\u1ec7p t\u1eeb NBAEM<\/h3>\n<ul>\n<li>X\u1eed l\u00fd nam ch\u00e2m c\u1ea9n th\u1eadn \u0111\u1ec3 tr\u00e1nh tr\u1ea7y x\u01b0\u1edbc ho\u1eb7c n\u1ee9t l\u1edbp ph\u1ee7. Ngay c\u1ea3 m\u1ed9t v\u1ebft n\u1ee9t nh\u1ecf c\u0169ng c\u00f3 th\u1ec3 \u0111\u1ec3 r\u1ec9 s\u00e9t x\u00e2m nh\u1eadp.<\/li>\n<li>\u0110\u1ed1i v\u1edbi s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p, l\u00ean k\u1ebf ho\u1ea1ch ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 v\u00e0 thay th\u1ebf nam ch\u00e2m b\u1ecb h\u1ecfng tr\u01b0\u1edbc khi ch\u00fang g\u00e2y ra v\u1ea5n \u0111\u1ec1 l\u1edbn h\u01a1n.<\/li>\n<\/ul>\n<h2>C\u00e1ch lo\u1ea1i b\u1ecf r\u1ec9 s\u00e9t kh\u1ecfi nam ch\u00e2m<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Safe_Rust_Removal_from_Magnets_tibCOqhH4.webp\" alt=\"Lo\u1ea1i b\u1ecf r\u1ec9 s\u00e9t an to\u00e0n kh\u1ecfi nam ch\u00e2m\" \/><\/p>\n<p>N\u1ebfu nam ch\u00e2m b\u1eaft \u0111\u1ea7u xu\u1ea5t hi\u1ec7n r\u1ec9 s\u00e9t, \u0111\u00f4i khi b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m s\u1ea1ch v\u00e0 ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng \u2014 \u0111\u00f4i khi, t\u1ed1t h\u01a1n l\u00e0 thay th\u1ebf. M\u1eb9o l\u00e0 l\u00e0m s\u1ea1ch m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng l\u1edbp ph\u1ee7 ho\u1eb7c h\u00ecnh d\u1ea1ng c\u1ee7a nam ch\u00e2m, v\u00ec c\u1ea3 hai \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/p>\n<p><strong>Ph\u01b0\u01a1ng ph\u00e1p lo\u1ea1i b\u1ecf r\u1ec9 s\u00e9t an to\u00e0n:<\/strong><\/p>\n<ul>\n<li><strong>R\u1ec9 s\u00e9t nh\u1eb9 tr\u00ean b\u1ec1 m\u1eb7t:<\/strong> S\u1eed d\u1ee5ng kh\u0103n m\u1ec1m v\u1edbi h\u1ed7n h\u1ee3p x\u00e0 ph\u00f2ng r\u1eeda ch\u00e9n nh\u1eb9 v\u00e0 n\u01b0\u1edbc \u1ea5m. Lau kh\u00f4 ngay l\u1eadp t\u1ee9c \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n th\u00eam.<\/li>\n<li><strong>R\u1ec9 s\u00e9t c\u1ee9ng \u0111\u1ea7u:<\/strong> Ch\u00e0 nh\u1eb9 nh\u00e0ng b\u1eb1ng b\u00e0n ch\u1ea3i nylon ho\u1eb7c b\u00f4ng th\u00e9p m\u1ecbn c\u00f3 th\u1ec3 hi\u1ec7u qu\u1ea3, nh\u01b0ng c\u1ea9n th\u1eadn \u0111\u1ec3 kh\u00f4ng l\u00e0m tr\u1ea7y l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7, \u0111\u1eb7c bi\u1ec7t tr\u00ean <strong>nam ch\u00e2m neodymium<\/strong>.<\/li>\n<li><strong>Nam ch\u00e2m ph\u1ee7 l\u1edbp:<\/strong> Tr\u00e1nh c\u00e1c ch\u1ea5t m\u00e0i m\u00f2n v\u00e0 h\u00f3a ch\u1ea5t m\u1ea1nh c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t l\u1edbp ph\u1ee7 nickel, epoxy ho\u1eb7c k\u1ebdm.<\/li>\n<\/ul>\n<p><strong>Nh\u1eefng \u0111i\u1ec1u c\u1ea7n tr\u00e1nh:<\/strong><\/p>\n<ul>\n<li>Axit m\u1ea1nh nh\u01b0 gi\u1ea5m cho nam ch\u00e2m kh\u00f4ng ph\u1ee7 l\u1edbp (ch\u00fang c\u00f3 th\u1ec3 l\u00e0m r\u1ec9 s\u00e9t t\u1ed3i t\u1ec7 h\u01a1n n\u1ebfu v\u00e0o c\u00e1c v\u1ebft n\u1ee9t).<\/li>\n<li>D\u1ee5ng c\u1ee5 \u0111i\u1ec7n \u0111\u1ec3 l\u00e0m s\u1ea1ch \u2014 nhi\u1ec7t \u0111\u1ed9 t\u0103ng c\u00f3 th\u1ec3 l\u00e0m y\u1ebfu \u0111i s\u1ee9c m\u1ea1nh c\u1ee7a nam ch\u00e2m.<\/li>\n<\/ul>\n<p><strong>Khi n\u00e0o n\u00ean thay th\u1ebf nam ch\u00e2m:<\/strong><\/p>\n<ul>\n<li>N\u1ebfu r\u1ec9 s\u00e9t \u0111\u00e3 \u0103n s\u00e2u v\u00e0o v\u1eadt li\u1ec7u, g\u00e2y ra c\u00e1c v\u1ebft r\u1ed7 ho\u1eb7c v\u1ee1 v\u1ee5n.<\/li>\n<li>N\u1ebfu nam ch\u00e2m m\u1ea5t \u0111i l\u1ef1c h\u00fat \u0111\u00e1ng k\u1ec3.<\/li>\n<li>N\u1ebfu l\u1edbp ph\u1ee7 bong tr\u00f3c \u0111\u1ec3 l\u1ed9 kim lo\u1ea1i b\u00ean d\u01b0\u1edbi.<\/li>\n<\/ul>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam chi ti\u1ebft v\u1ec1 c\u00e1ch ch\u1ecdn v\u1eadt li\u1ec7u ch\u1ed1ng r\u1ec9, b\u1ea1n c\u00f3 th\u1ec3 xem t\u1ea1i \u0111\u00e2y <strong><a href=\"https:\/\/nbaem.com\/vi\/overview-for-types-of-magnets\/\" target=\"_blank\" rel=\"noopener\">t\u1ed5ng quan v\u1ec1 c\u00e1c lo\u1ea1i nam ch\u00e2m<\/a><\/strong> \u0111\u1ec3 so s\u00e1nh c\u00e1c l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u1ee7a b\u1ea1n.<\/p>\n<h2>C\u00e1c xem x\u00e9t \u0111\u1eb7c bi\u1ec7t cho s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 th\u01b0\u01a1ng m\u1ea1i<\/h2>\n<p>Trong c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p v\u00e0 th\u01b0\u01a1ng m\u1ea1i, r\u1ec9 s\u00e9t tr\u00ean nam ch\u00e2m kh\u00f4ng ch\u1ec9 l\u00e0 v\u1ea5n \u0111\u1ec1 v\u1ec1 th\u1ea9m m\u1ef9 \u2014 n\u00f3 c\u00f3 th\u1ec3 g\u00e2y ra th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a thi\u1ebft b\u1ecb nghi\u00eam tr\u1ecdng v\u00e0 s\u1eeda ch\u1eefa t\u1ed1n k\u00e9m. Trong c\u00e1c nh\u00e0 m\u00e1y, nam ch\u00e2m th\u01b0\u1eddng ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m, d\u1ea7u m\u1ee1, dung d\u1ecbch l\u00e0m m\u00e1t, th\u1eadm ch\u00ed c\u1ea3 n\u01b0\u1edbc mu\u1ed1i trong c\u00e1c \u1ee9ng d\u1ee5ng h\u00e0ng h\u1ea3i. B\u1ea5t k\u1ef3 s\u1ef1 \u0103n m\u00f2n n\u00e0o tr\u00ean b\u1ec1 m\u1eb7t nam ch\u00e2m \u0111\u1ec1u c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m l\u1ef1c h\u00fat, g\u00e2y h\u01b0 h\u1ecfng c\u00e1c thi\u1ebft b\u1ecb xung quanh v\u00e0 l\u00e0m gi\u1ea3m an to\u00e0n.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c ho\u1ea1t \u0111\u1ed9ng nh\u01b0 d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t, h\u1ec7 th\u1ed1ng b\u0103ng chuy\u1ec1n, b\u1ed9 t\u00e1ch t\u1eeb ho\u1eb7c thi\u1ebft b\u1ecb n\u00e2ng, vi\u1ec7c s\u1eed d\u1ee5ng nam ch\u00e2m c\u00f3 l\u1edbp b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n ph\u00f9 h\u1ee3p l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft. <strong>Nam ch\u00e2m ph\u1ee7 nickel neodymium, nam ch\u00e2m ph\u1ee7 epoxy ho\u1eb7c c\u00e1c b\u1ed9 l\u1eafp r\u00e1p k\u00edn ho\u00e0n to\u00e0n<\/strong> l\u00e0 c\u00e1c l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn \u0111\u1ec3 x\u1eed l\u00fd \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd.<\/p>\n<p>NBAEM cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p nam ch\u00e2m t\u00f9y ch\u1ec9nh ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng n\u00e0y \u2014 bao g\u1ed3m l\u1edbp ph\u1ee7 ch\u1ea5t l\u01b0\u1ee3ng cao, v\u1ecf b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 v\u00e0 h\u1ee3p kim \u0111\u1eb7c bi\u1ec7t ch\u1ed1ng r\u1ec9 s\u00e9t m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng. V\u00ed d\u1ee5:<\/p>\n<ul>\n<li><strong>nh\u00e0 m\u00e1y ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m<\/strong> s\u1eed d\u1ee5ng nam ch\u00e2m bao b\u1ecdc b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u1ec3 \u0111\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n v\u1ec7 sinh v\u00e0 ng\u0103n ng\u1eeba \u00f4 nhi\u1ec5m.<\/li>\n<li><strong>ho\u1ea1t \u0111\u1ed9ng khai th\u00e1c m\u1ecf<\/strong> d\u1ef1a v\u00e0o nam ch\u00e2m ph\u1ee7 epoxy \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u0111\u1ed9 \u1ea9m, b\u1ee5i v\u00e0 c\u00e1c v\u1eadt li\u1ec7u m\u00e0i m\u00f2n.<\/li>\n<li><strong>\u1ee8ng d\u1ee5ng h\u00e0ng h\u1ea3i<\/strong> ch\u1ecdn nam ch\u00e2m k\u00edn ch\u1ecbu \u0111\u01b0\u1ee3c n\u01b0\u1edbc mu\u1ed1i \u0111\u1ec3 x\u1eed l\u00fd ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc bi\u1ec3n.<\/li>\n<\/ul>\n<p>B\u1eb1ng c\u00e1ch ch\u1ecdn \u0111\u00fang lo\u1ea1i nam ch\u00e2m v\u00e0 l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 t\u1eeb \u0111\u1ea7u, c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p t\u1ea1i Vi\u1ec7t Nam c\u00f3 th\u1ec3 gi\u1ea3m chi ph\u00ed b\u1ea3o tr\u00ec, tr\u00e1nh ng\u1eebng s\u1ea3n xu\u1ea5t v\u00e0 duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng quan tr\u1ecdng m\u1ed9t c\u00e1ch tr\u01a1n tru.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u xem nam ch\u00e2m c\u00f3 th\u1ec3 b\u1ecb g\u1ec9, lo\u1ea1i n\u00e0o d\u1ec5 b\u1ecb \u0103n m\u00f2n v\u00e0 c\u00e1ch b\u1ea3o v\u1ec7 s\u1ee9c m\u1ea1nh t\u1eeb t\u00ednh c\u0169ng nh\u01b0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a ch\u00fang<\/p>","protected":false},"author":1,"featured_media":1969,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1961","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Rusty-magnet.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1961","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/comments?post=1961"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1961\/revisions"}],"predecessor-version":[{"id":1972,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1961\/revisions\/1972"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1969"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}