Bakin karfe ya ƙunshi mafi ƙarancin 10.5% chromium, wanda ke samar da sirara, ganuwa, kuma mai mannewa sosai akan saman karfen da ake kira “passive Layer.” Wannan m Layer shine abin da ke sa bakin karfe ya jure tsatsa da lalata.
Lokacin da karfe ya fallasa ga iskar oxygen da danshi, chromium a cikin karfe yana amsawa tare da iskar oxygen a cikin iska don samar da siririn Layer na chromium oxide a saman karfen. Wannan Layer oxide na chromium yana da kariya sosai, saboda yana da ƙarfi sosai kuma baya rushewa cikin sauƙi. Sakamakon haka, yana hana ƙarfen da ke ƙarƙashinsa yadda ya kamata ya shiga cikin iska da danshi, waɗanda ke da mahimmanci don aiwatar da tsatsa.
Ƙaƙƙarfan Layer yana da mahimmanci ga juriya na lalata na bakin karfe, kuma adadin chromium a cikin karfe yana ƙayyade ikonsa na tsayayya da tsatsa da lalata. Maɗaukakin abun ciki na chromium yana haifar da ƙarin kariya mai wucewa da mafi kyawun juriya na lalata. Bugu da ƙari, ana iya ƙara wasu abubuwa kamar nickel, molybdenum, da nitrogen a cikin ƙarfe don inganta juriyar lalata.
Lokacin aikawa: Fabrairu-15-2023