PULODI ZANGNOGIR

PULODI ZANGNOGIR, pulodi legironidaest, ki dar sharoiti atmosfera va dar muhithoi faol zang namezanad. Pulohi zangnogir asosan bo khrom (12—20%) ligeronida shudaast (nig. Legironi). Gayr az in dar tarkibi on S, Si, Mn, S, R (elemegthoi hamrohi ohan) va Ni, Mn, Ti, Nb, Co, Mo (elementhoe, ki baroi zangnogir shudani pulod dokhil meshavand) mavjudand. Dar tarkibi pulod Sr har qadar beshtar boshad, on hamon qadar korroziyaustuvor mesha­vad.

Sababi zangnogir shudani pulod on ast, ki dar sathi rasish bo muhiti faol pardai baso tunuki oksidho yo digar payvasthoi halnashavanda paydo meshavad. Az rui tarkibi khimiyavi Pulodt zangnogiri khromi, khrominikeli va khromumarganetsunikeli (hamagi besh az 100 tamga) mavjudand. Pulodi zangnogir khromii strukturaosh martensiti (dar holati sufta) az hama beshtar ba korroziya ustuvor buda, baroi tayyor kardani klapanhoi presshoi gidravliki, parrahoi tur­bina, afzori buranda, prujinaho, asbobi ruzgor va gayra istifoda meshavad. Pulodi zangnogirro dar namudi haddodishuda va ham dar namudi rekhta istifoda mebarand. Nig. niz Pulod.