Yawancin mutane suna tunanin cewa bakin karfe abu ne na karfe wanda ba zai yi tsatsa ba kuma yana da acid da alkali. Amma a cikin rayuwar yau da kullun, mutane suna ganin cewa tukwane na bakin karfe da kettles na lantarki da ake amfani da su don dafa abinci galibi suna da tsatsa ko tabo. Me ke faruwa daidai?
Bari mu fara gane, menene bakin karfe?
Bisa ga ma'auni na kasa GB/T20878-2007 "Bakin Karfe da Heat-Resistant Karfe Grades da Chemical Compositions", ma'anar bakin karfe shi ne: bakin karfe da lalata juriya a matsayin babban halaye, tare da abun ciki na chromium na akalla 10.5% kuma abun ciki na carbon wanda bai wuce 1.2% ba. karfe. Nau'in da ke da juriya ga kafofin watsa labaru na lalata (acid, alkali, gishiri, da sauransu) ana kiransa ƙarfe mai jurewa acid.
To me yasa bakin karfe ke jure lalata?
Domin bakin karfe, bayan an yi shi, za a yi tsintsiya madaurinki daya da wuce gona da iri domin kawar da kowane irin mai, tsatsa da sauran datti a saman. A surface zai zama uniform azurfa, forming uniform da m passivation film, don haka rage juriya na bakin karfe zuwa oxidizing kafofin watsa labarai. Matsakaicin ƙimar lalata da ingantaccen juriya na lalata.
Don haka tare da irin wannan fim ɗin wucewa akan bakin karfe, shin tabbas ba zai yi tsatsa ba?
A gaskiya ma, a cikin rayuwarmu ta yau da kullum, ions chloride a cikin gishiri yana da mummunar tasiri akan fim din bakin karfe, wanda zai iya haifar da hazo na abubuwan karfe.
A halin yanzu, bisa ka'ida, akwai nau'ikan lalacewa iri biyu ga fim ɗin wucewa ta hanyar ions chlorine:
1. Ka'idar fim ta mataki: ions Chloride suna da ƙaramin radius da ƙarfi mai ƙarfi. Za su iya shiga cikin ƙananan giɓin da ke cikin fim ɗin oxide cikin sauƙi, su isa saman karfe, kuma su yi hulɗa da karfe don samar da mahadi masu narkewa, wanda ke canza tsarin fim din oxide.
2. Ka'idar Adsorption: Chloride ions suna da ƙarfi mai ƙarfi da ƙarfe. Ana iya ƙara su da ƙarfe da aka fi so kuma a fitar da iskar oxygen daga saman ƙarfe. Chloride ions da oxygen ions suna gasa don wuraren tallatawa akan saman karfe kuma suna samar da chloride tare da karfe; A adsorption na chloride da karfe ne m, forming abubuwa masu narkewa, wanda take kaiwa zuwa kara lalata.
Don duba bakin karfe:
Binciken bakin karfe ya kasu kashi shida gwaje-gwajen yi da ayyukan bincike guda biyu
Gwajin Aiki:
Kaddarorin jiki, kaddarorin sinadarai, kaddarorin injina, iya aiki, dubawar ƙarfe da kuma duba mara lalacewa.
Aikin Nazari:
Binciken karaya, nazarin lalata, da dai sauransu;
Baya ga ma'auni da aka yi amfani da su don bambance GB/T20878-2007 "Bakin Karfe da Heat-Resistant Karfe Grades da Chemical Compositions", akwai kuma:
GB/T 13305
GB/T 13671
GB/T 19228.1, GB/T 19228.2, GB/T 19228.3
GB/T 20878 Bakin karfe da zafi-resistant karfe maki da sinadaran abun da ke ciki
Ma'auni na ƙasa don duba bakin karfe na abinci shine GB9684-2011 (kayan bakin karfe). Binciken bakin karfe na abinci ya kasu kashi biyu: manyan kayan aiki da kayan da ba na asali ba.
Yadda ake aiki:
1. Alama: Gwajin bakin karfe yana buƙatar sanya alamar ƙarshen kayan gwaji tare da fenti na launuka daban-daban.
2. Bugawa: Hanyar fesa fenti akan sassan (ƙarshen, fuskokin ƙare) da aka ƙayyade a cikin dubawa, yana nuna darajar, daidaitattun, ƙayyadaddun bayanai, da dai sauransu na kayan.
3. Tag: Bayan an kammala dubawa, za a saka kayan a cikin daure, kwalaye, da shafts don nuna darajar sa, girmansa, nauyi, lambar daidaitattun, mai sayarwa, da dai sauransu.
Lokacin aikawa: Dec-27-2023