Dhererka 0 ~ 12m ama sida ku xusan shuruudahaaga
Alloy 20 waa a aulti-bir-iromium aloper iyo molybdenum oo ku daray caabbinta ugu sareeya ee lagu weerarayo aashitada, gaar ahaan sulfuric acid.
Alloy 20 (20CB-3) waa bir bir aan caadi ahayn oo loogu talagalay caabbinta ugu sareeya ee loo yaqaan 'aashito loo yaqaan' aashitada weerarada aashitada sidaas darteedna ay leedahay iska caabin heer sare ah oo ku saabsan aashitada kulul ee kulul. Alloy 20 ayaa sidoo kale u adkaysata dharka isqargalinta ee xaalada ka mid ah. Alloy 20 oo leh 33% Nikkel ayaa si ficil ah ugu difaacaya dildilaaca walxaha diiqadda chloride chloride. Alloy 20 waxaa si weyn loogu isticmaalaa haamaha sulluric acid aashitada, xarkaha iyo kuleylka kuleylka, kuleylka kuleylka, hanaanka tuubbooyinka, kiimikada iyo qalabka wax badan. Nijaarte 20 cb-3 saxanka waa nickel-binicel-birta-implium ee ku saleysan austenium alusen; Waxay leedahay iska caabin aad u fiican oo jawiga kiimikada ah oo ay kujiraan aashitada sulfuric iyo warbaahin kale oo badan oo wasakh ah.