在基體金(jin)(jin)(jin)屬中(zhong)(zhong)(zhong)加入(ru)(ru)(ru)(ru)能(neng)(neng)促進鈍(dun)化(hua)(hua)(hua)的合(he)(he)金(jin)(jin)(jin)成(cheng)(cheng)分，當加入(ru)(ru)(ru)(ru)量達到(dao)一(yi)定(ding)比(bi)(bi)例(li)后，得到(dao)耐(nai)(nai)(nai)蝕(shi)性(xing)(xing)(xing)優(you)良(liang)的材料。如鐵(tie)(tie)中(zhong)(zhong)(zhong)加入(ru)(ru)(ru)(ru)鉻(ge)，當鉻(ge)量達12％以上時，就成(cheng)(cheng)為不銹(xiu)鋼，在氧化(hua)(hua)(hua)環境中(zhong)(zhong)(zhong)由(you)于表面生成(cheng)(cheng)鈍(dun)化(hua)(hua)(hua)膜，有(you)很(hen)高(gao)的耐(nai)(nai)(nai)蝕(shi)性(xing)(xing)(xing)。鉻(ge)鋼中(zhong)(zhong)(zhong)加入(ru)(ru)(ru)(ru)鎳，可(ke)擴大(da)鈍(dun)化(hua)(hua)(hua)范圍，還可(ke)提高(gao)機(ji)械(xie)性(xing)(xing)(xing)能(neng)(neng)。鎳銅合(he)(he)金(jin)(jin)(jin)中(zhong)(zhong)(zhong)的鎳大(da)于30％～40％時，可(ke)得到(dao)含鎳10％～30％的銅鎳合(he)(he)金(jin)(jin)(jin)（cupron-nickel）和(he)鎳70鋼30（Monel）合(he)(he)金(jin)(jin)(jin)，它們比(bi)(bi)純(chun)銅和(he)純(chun)鎳的耐(nai)(nai)(nai)蝕(shi)性(xing)(xing)(xing)在一(yi)些(xie)(xie)環境中(zhong)(zhong)(zhong)更優(you)越些(xie)(xie)。一(yi)系列(lie)鎳合(he)(he)金(jin)(jin)(jin)是(shi)有(you)名的耐(nai)(nai)(nai)蝕(shi)材料，如鎳鑄鐵(tie)(tie)有(you)優(you)良(liang)的耐(nai)(nai)(nai)堿性(xing)(xing)(xing)。鎳鉬(mu)合(he)(he)金(jin)(jin)(jin)是(shi)少數(shu)能(neng)(neng)耐(nai)(nai)(nai)高(gao)溫非氧化(hua)(hua)(hua)性(xing)(xing)(xing)酸(suan)（如鹽(yan)酸(suan)）的合(he)(he)金(jin)(jin)(jin)。鎳鉬(mu)鉻(ge)鐵(tie)(tie)合(he)(he)金(jin)(jin)(jin)能(neng)(neng)耐(nai)(nai)(nai)高(gao)溫氧化(hua)(hua)(hua)性(xing)(xing)(xing)酸(suan)、次氯酸(suan)鹽(yan)、海水等，比(bi)(bi)一(yi)般不銹(xiu)鋼更好。