{"id":5125,"date":"2026-11-11T16:24:41","date_gmt":"2026-11-11T09:24:41","guid":{"rendered":"https:\/\/blueone.vn\/?p=5125"},"modified":"2026-11-11T16:24:41","modified_gmt":"2026-11-11T09:24:41","slug":"nhung-tieu-chi-danh-gia-nuoc-lam-mat-tot","status":"publish","type":"post","link":"https:\/\/blueone.vn\/en\/nhung-tieu-chi-danh-gia-nuoc-lam-mat-tot\/","title":{"rendered":"Nh\u1eefng Ti\u00eau Ch\u00ed \u0110\u00e1nh Gi\u00e1 N\u01b0\u1edbc L\u00e0m M\u00e1t T\u1ed1t"},"content":{"rendered":"

Coolant<\/a><\/strong> \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh v\u00e0 b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 \u00f4 t\u00f4. Trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng, \u0111\u1ed9ng c\u01a1 sinh ra l\u01b0\u1ee3ng nhi\u1ec7t r\u1ea5t l\u1edbn do qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y nhi\u00ean li\u1ec7u v\u00e0 ma s\u00e1t gi\u1eefa c\u00e1c chi ti\u1ebft c\u01a1 kh\u00ed. N\u1ebfu nhi\u1ec7t l\u01b0\u1ee3ng kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t hi\u1ec7u qu\u1ea3, \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 g\u1eb7p t\u00ecnh tr\u1ea1ng qu\u00e1 nhi\u1ec7t, gi\u1ea3m hi\u1ec7u su\u1ea5t, th\u1eadm ch\u00ed h\u01b0 h\u1ecfng nghi\u00eam tr\u1ecdng. Ch\u00ednh v\u00ec v\u1eady, l\u1ef1a ch\u1ecdn m\u1ed9t s\u1ea3n ph\u1ea9m n\u01b0\u1edbc l\u00e0m m\u00e1t ch\u1ea5t l\u01b0\u1ee3ng l\u00e0 y\u1ebfu t\u1ed1 c\u1ea7n \u0111\u01b0\u1ee3c quan t\u00e2m trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng v\u00e0 b\u1ea3o d\u01b0\u1ee1ng ph\u01b0\u01a1ng ti\u1ec7n.<\/p>\n

Tuy nhi\u00ean, tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n nay c\u00f3 r\u1ea5t nhi\u1ec1u lo\u1ea1i n\u01b0\u1edbc l\u00e0m m\u00e1t v\u1edbi m\u00e0u s\u1eafc, th\u00e0nh ph\u1ea7n, c\u00f4ng ngh\u1ec7 ph\u1ee5 gia v\u00e0 m\u1ee9c gi\u00e1 kh\u00e1c nhau. Kh\u00f4ng ph\u1ea3i s\u1ea3n ph\u1ea9m n\u00e0o c\u00f3 m\u00e0u s\u1eafc \u0111\u1eb9p, gi\u00e1 cao ho\u1eb7c qu\u1ea3ng c\u00e1o th\u1eddi gian s\u1eed d\u1ee5ng d\u00e0i c\u0169ng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng. \u0110\u1ec3 l\u1ef1a ch\u1ecdn \u0111\u00fang s\u1ea3n ph\u1ea9m, ng\u01b0\u1eddi d\u00f9ng c\u1ea7n hi\u1ec3u r\u00f5 nh\u1eefng ti\u00eau ch\u00ed \u0111\u00e1nh gi\u00e1 n\u01b0\u1edbc l\u00e0m m\u00e1t t\u1ed1t, t\u1eeb kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t, ch\u1ed1ng \u0103n m\u00f2n \u0111\u1ebfn th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt.<\/p>\n

\"Ti\u00eau
Nh\u1eefng ti\u00eau ch\u00ed \u0111\u00e1nh gi\u00e1 n\u01b0\u1edbc l\u00e0m m\u00e1t t\u1ed1t<\/em><\/figcaption><\/figure>\n

Kh\u1ea3 n\u0103ng gi\u1ea3i nhi\u1ec7t v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed9ng c\u01a1<\/h2>\n

\u0110\u00e2y l\u00e0 ti\u00eau ch\u00ed quan tr\u1ecdng h\u00e0ng \u0111\u1ea7u khi \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc l\u00e0m m\u00e1t. Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh, \u0111\u1ed9ng c\u01a1 \u00f4 t\u00f4 li\u00ean t\u1ee5c sinh nhi\u1ec7t v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t ki\u1ec3m so\u00e1t \u0111\u1ec3 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 trong ph\u1ea1m vi thi\u1ebft k\u1ebf. N\u01b0\u1edbc l\u00e0m m\u00e1t c\u00f3 nhi\u1ec7m v\u1ee5 h\u1ea5p th\u1ee5 nhi\u1ec7t t\u1eeb \u0111\u1ed9ng c\u01a1, sau \u0111\u00f3 v\u1eadn chuy\u1ec3n nhi\u1ec7t l\u01b0\u1ee3ng \u0111\u1ebfn k\u00e9t n\u01b0\u1edbc \u0111\u1ec3 gi\u1ea3i ph\u00f3ng ra m\u00f4i tr\u01b0\u1eddng th\u00f4ng qua qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i nhi\u1ec7t.<\/p>\n

M\u1ed9t s\u1ea3n ph\u1ea9m ch\u1ea5t l\u01b0\u1ee3ng c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t ph\u00f9 h\u1ee3p, duy tr\u00ec \u0111\u1eb7c t\u00ednh \u1ed5n \u0111\u1ecbnh trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh cao v\u00e0 h\u1ed7 tr\u1ee3 h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3. \u0110\u1eb7c bi\u1ec7t, dung d\u1ecbch ph\u1ea3i \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 nhi\u1ec7t \u0111\u1ed9 s\u00f4i v\u00e0 nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3ng b\u0103ng theo \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng. Nh\u1eefng \u0111\u1eb7c t\u00ednh n\u00e0y gi\u00fap h\u1ea1n ch\u1ebf nguy c\u01a1 s\u00f4i dung d\u1ecbch, \u0111\u00f3ng b\u0103ng ho\u1eb7c m\u1ea5t kh\u1ea3 n\u0103ng tu\u1ea7n ho\u00e0n trong h\u1ec7 th\u1ed1ng.<\/p>\n

Ngo\u00e0i ra, ng\u01b0\u1eddi d\u00f9ng c\u1ea7n quan t\u00e2m \u0111\u1ebfn th\u00e0nh ph\u1ea7n glycol v\u00e0 t\u1ef7 l\u1ec7 pha ch\u1ebf c\u1ee7a s\u1ea3n ph\u1ea9m. Ethylene Glycol l\u00e0 th\u00e0nh ph\u1ea7n ph\u1ed5 bi\u1ebfn trong nhi\u1ec1u lo\u1ea1i n\u01b0\u1edbc l\u00e0m m\u00e1t \u00f4 t\u00f4, c\u00f3 t\u00e1c d\u1ee5ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u1ed9 s\u00f4i v\u00e0 \u0111\u00f3ng b\u0103ng c\u1ee7a dung d\u1ecbch. Tuy nhi\u00ean, t\u1ef7 l\u1ec7 glycol qu\u00e1 cao kh\u00f4ng \u0111\u1ed3ng ngh\u0129a v\u1edbi kh\u1ea3 n\u0103ng gi\u1ea3i nhi\u1ec7t t\u1ed1t h\u01a1n. Vi\u1ec7c l\u1ef1a ch\u1ecdn n\u1ed3ng \u0111\u1ed9 c\u1ea7n c\u0103n c\u1ee9 v\u00e0o c\u00f4ng th\u1ee9c s\u1ea3n ph\u1ea9m v\u00e0 khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t ph\u01b0\u01a1ng ti\u1ec7n.<\/p>\n

Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c chi ti\u1ebft trong h\u1ec7 th\u1ed1ng<\/h2>\n

B\u00ean c\u1ea1nh ch\u1ee9c n\u0103ng gi\u1ea3i nhi\u1ec7t, n\u01b0\u1edbc l\u00e0m m\u00e1t t\u1ed1t c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 c\u00e1c chi ti\u1ebft b\u00ean trong h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t kh\u1ecfi hi\u1ec7n t\u01b0\u1ee3ng \u0103n m\u00f2n v\u00e0 oxy h\u00f3a. Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh, dung d\u1ecbch ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi nhi\u1ec1u v\u1eadt li\u1ec7u kh\u00e1c nhau nh\u01b0 nh\u00f4m, gang, th\u00e9p, \u0111\u1ed3ng v\u00e0 c\u00e1c h\u1ee3p kim kim lo\u1ea1i. N\u1ebfu kh\u00f4ng c\u00f3 h\u1ec7 ph\u1ee5 gia b\u1ea3o v\u1ec7 ph\u00f9 h\u1ee3p, nh\u1eefng chi ti\u1ebft n\u00e0y c\u00f3 th\u1ec3 b\u1ecb \u0103n m\u00f2n theo th\u1eddi gian, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

\u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng b\u1ed5 sung nh\u1eefng nh\u00f3m ph\u1ee5 gia ch\u1ed1ng \u0103n m\u00f2n v\u00e0o c\u00f4ng th\u1ee9c n\u01b0\u1edbc l\u00e0m m\u00e1t. M\u1ed9t s\u1ed1 c\u00f4ng ngh\u1ec7 ph\u1ed5 bi\u1ebfn g\u1ed3m IAT (Inorganic Additive Technology), OAT (Organic Acid Technology) v\u00e0 HOAT (Hybrid Organic Acid Technology). M\u1ed7i c\u00f4ng ngh\u1ec7 c\u00f3 c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m s\u1eed d\u1ee5ng ri\u00eang. Trong \u0111\u00f3, OAT s\u1eed d\u1ee5ng c\u00e1c ch\u1ea5t \u1ee9c ch\u1ebf \u0103n m\u00f2n g\u1ed1c axit h\u1eefu c\u01a1, th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong nh\u1eefng d\u00f2ng dung d\u1ecbch l\u00e0m m\u00e1t<\/a><\/strong> c\u00f3 th\u1eddi gian s\u1eed d\u1ee5ng d\u00e0i.<\/p>\n

Khi l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m, ng\u01b0\u1eddi d\u00f9ng n\u00ean \u01b0u ti\u00ean lo\u1ea1i c\u00f3 th\u00f4ng tin r\u00f5 r\u00e0ng v\u1ec1 c\u00f4ng ngh\u1ec7 ph\u1ee5 gia v\u00e0 kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 v\u1eadt li\u1ec7u. \u0110\u1eb7c bi\u1ec7t, c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c chi ti\u1ebft b\u1eb1ng nh\u00f4m trong \u0111\u1ed9ng c\u01a1 hi\u1ec7n \u0111\u1ea1i. \u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng b\u1edfi nhi\u1ec1u h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t \u00f4 t\u00f4 ng\u00e0y nay s\u1eed d\u1ee5ng k\u00e9t n\u01b0\u1edbc, th\u00e2n m\u00e1y ho\u1eb7c c\u00e1c b\u1ed9 ph\u1eadn b\u1eb1ng h\u1ee3p kim nh\u00f4m.<\/p>\n

M\u1ed9t s\u1ea3n ph\u1ea9m n\u01b0\u1edbc l\u00e0m m\u00e1t ch\u1ea5t l\u01b0\u1ee3ng kh\u00f4ng ch\u1ec9 gi\u00fap ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 m\u00e0 c\u00f2n ph\u1ea3i duy tr\u00ec kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 \u1ed5n \u0111\u1ecbnh trong su\u1ed1t th\u1eddi gian s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb. \u0110i\u1ec1u n\u00e0y gi\u00fap h\u1ea1n ch\u1ebf r\u00f2 r\u1ec9 do \u0103n m\u00f2n, gi\u1ea3m nguy c\u01a1 h\u01b0 h\u1ecfng k\u00e9t n\u01b0\u1edbc, b\u01a1m n\u01b0\u1edbc v\u00e0 c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn dung d\u1ecbch.<\/p>\n

Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 ph\u1ee5 gia r\u00f5 r\u00e0ng<\/h2>\n

Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc l\u00e0 m\u1ed9t trong nh\u1eefng c\u0103n c\u1ee9 quan tr\u1ecdng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc l\u00e0m m\u00e1t. M\u1ed9t s\u1ea3n ph\u1ea9m t\u1ed1t c\u1ea7n c\u00f3 c\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u00e0 ki\u1ec3m so\u00e1t r\u00f5 r\u00e0ng, trong \u0111\u00f3 c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh ph\u1ea3i \u0111\u00e1p \u1ee9ng \u0111\u00fang ch\u1ee9c n\u0103ng c\u1ee7a dung d\u1ecbch. Th\u00f4ng th\u01b0\u1eddng, n\u01b0\u1edbc l\u00e0m m\u00e1t \u0111\u1ed9ng c\u01a1 g\u1ed3m ch\u1ea5t n\u1ec1n glycol, n\u01b0\u1edbc tinh khi\u1ebft ho\u1eb7c n\u01b0\u1edbc kh\u1eed kho\u00e1ng v\u00e0 h\u1ec7 th\u1ed1ng ph\u1ee5 gia chuy\u00ean d\u1ee5ng.<\/p>\n

\u0110\u1ed1i v\u1edbi ch\u1ea5t n\u1ec1n glycol, Ethylene Glycol \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1edd kh\u1ea3 n\u0103ng \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3ng b\u0103ng v\u00e0 nhi\u1ec7t \u0111\u1ed9 s\u00f4i. M\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m kh\u00e1c c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng Propylene Glycol. B\u00ean c\u1ea1nh \u0111\u00f3, n\u01b0\u1edbc \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00f4ng th\u1ee9c c\u1ea7n c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng ph\u00f9 h\u1ee3p nh\u1eb1m h\u1ea1n ch\u1ebf c\u00e1c ion kho\u00e1ng c\u00f3 th\u1ec3 g\u00e2y \u0111\u00f3ng c\u1eb7n v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t.<\/p>\n

H\u1ec7 ph\u1ee5 gia l\u00e0 th\u00e0nh ph\u1ea7n quy\u1ebft \u0111\u1ecbnh nhi\u1ec1u \u0111\u1eb7c t\u00ednh quan tr\u1ecdng c\u1ee7a s\u1ea3n ph\u1ea9m. Ngo\u00e0i ch\u1ea5t ch\u1ed1ng \u0103n m\u00f2n, c\u00f4ng th\u1ee9c c\u00f3 th\u1ec3 ch\u1ee9a ph\u1ee5 gia ch\u1ed1ng t\u1ea1o b\u1ecdt, \u1ed5n \u0111\u1ecbnh pH v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n h\u1ed7 tr\u1ee3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng. M\u1ed7i nh\u00f3m ph\u1ee5 gia c\u00f3 nhi\u1ec7m v\u1ee5 ri\u00eang, ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 duy tr\u00ec \u0111\u1eb7c t\u00ednh c\u1ee7a dung d\u1ecbch trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/p>\n

Ng\u01b0\u1eddi d\u00f9ng n\u00ean \u01b0u ti\u00ean nh\u1eefng s\u1ea3n ph\u1ea9m c\u00f4ng b\u1ed1 r\u00f5 c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t, th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n v\u00e0 t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt. Kh\u00f4ng n\u00ean \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng ch\u1ec9 d\u1ef1a tr\u00ean m\u00e0u s\u1eafc. M\u00e0u xanh, \u0111\u1ecf, h\u1ed3ng ho\u1eb7c v\u00e0ng ch\u1ee7 y\u1ebfu l\u00e0 ch\u1ea5t t\u1ea1o m\u00e0u \u0111\u1ec3 nh\u1eadn di\u1ec7n s\u1ea3n ph\u1ea9m, kh\u00f4ng ph\u1ea3i y\u1ebfu t\u1ed1 ch\u1ee9ng minh dung d\u1ecbch c\u00f3 c\u00f4ng ngh\u1ec7 t\u1ed1t h\u01a1n ho\u1eb7c kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 cao h\u01a1n.<\/p>\n

Ngo\u00e0i ra, kh\u00f4ng n\u00ean t\u1ef1 \u00fd tr\u1ed9n nhi\u1ec1u lo\u1ea1i n\u01b0\u1edbc l\u00e0m m\u00e1t c\u00f3 c\u00f4ng ngh\u1ec7 ph\u1ee5 gia kh\u00e1c nhau n\u1ebfu ch\u01b0a x\u00e1c nh\u1eadn kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch. M\u1ed9t s\u1ed1 c\u00f4ng th\u1ee9c c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p \u0111\u01b0\u1ee3c, nh\u01b0ng nh\u1eefng c\u00f4ng th\u1ee9c kh\u00e1c c\u00f3 nguy c\u01a1 l\u00e0m suy gi\u1ea3m hi\u1ec7u qu\u1ea3 b\u1ea3o v\u1ec7 ho\u1eb7c g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng k\u1ebft t\u1ee7a. Vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u00fang lo\u1ea1i dung d\u1ecbch theo khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t xe lu\u00f4n l\u00e0 l\u1ef1a ch\u1ecdn an to\u00e0n h\u01a1n.<\/p>\n

Ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 th\u1eddi gian s\u1eed d\u1ee5ng<\/h2>\n
\"Ki\u1ec3m
Ki\u1ec3m tra ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt n\u01b0\u1edbc l\u00e0m m\u00e1t<\/em><\/figcaption><\/figure>\n

M\u1ed9t trong nh\u1eefng c\u00e1ch \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc l\u00e0m m\u00e1t l\u00e0 ki\u1ec3m tra c\u00e1c ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt m\u00e0 s\u1ea3n ph\u1ea9m \u0111\u00e1p \u1ee9ng. Nh\u1eefng ti\u00eau chu\u1ea9n n\u00e0y \u0111\u01b0a ra c\u00e1c y\u00eau c\u1ea7u v\u00e0 ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m nh\u1eb1m \u0111\u00e1nh gi\u00e1 nh\u1eefng \u0111\u1eb7c t\u00ednh quan tr\u1ecdng c\u1ee7a dung d\u1ecbch, ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, t\u01b0\u01a1ng th\u00edch v\u1eadt li\u1ec7u, t\u1ea1o b\u1ecdt v\u00e0 \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u1ed9.<\/p>\n

Trong \u0111\u00f3, ASTM D3306 l\u00e0 ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn \u0111\u1ed1i v\u1edbi n\u01b0\u1edbc l\u00e0m m\u00e1t g\u1ed1c glycol s\u1eed d\u1ee5ng cho \u0111\u1ed9ng c\u01a1 \u00f4 t\u00f4 v\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ti\u1ec7n c\u00f3 \u0111\u1ed9ng c\u01a1 \u0111\u1ed1t trong. Ti\u00eau chu\u1ea9n n\u00e0y \u0111\u01b0a ra nh\u1eefng y\u00eau c\u1ea7u v\u1ec1 t\u00ednh ch\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a dung d\u1ecbch l\u00e0m m\u00e1t. Khi l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 \u01b0u ti\u00ean nh\u1eefng lo\u1ea1i c\u00f3 c\u00f4ng b\u1ed1 \u0111\u00e1p \u1ee9ng ASTM D3306 ho\u1eb7c ti\u00eau chu\u1ea9n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u c\u1ee7a ph\u01b0\u01a1ng ti\u1ec7n.<\/p>\n

B\u00ean c\u1ea1nh ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a dung d\u1ecbch trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng c\u0169ng r\u1ea5t quan tr\u1ecdng. N\u01b0\u1edbc l\u00e0m m\u00e1t t\u1ed1t c\u1ea7n duy tr\u00ec \u0111\u01b0\u1ee3c \u0111\u1eb7c t\u00ednh h\u00f3a h\u1ecdc, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 hi\u1ec7u qu\u1ea3 ho\u1ea1t \u0111\u1ed9ng trong kho\u1ea3ng th\u1eddi gian \u0111\u01b0\u1ee3c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f4ng b\u1ed1. M\u1ed9t s\u1ed1 th\u00f4ng s\u1ed1 c\u00f3 th\u1ec3 tham kh\u1ea3o trong t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt g\u1ed3m:<\/p>\n