采用XPS和AES技术研究了F28低偏析奥氏体不锈钢在尿素合成介质中形成的钝化膜,并与化学成分类似的Sanicro28合金在相同条件下形成的钝化膜作了对比.结果表明,降低磷、硫和硅等杂质元素的偏析,使钢抗腐蚀性能提高的原因在于增加了钝化膜的Cr2O3含量,改善了钝化膜的防护能力.
The passive film formed on a stainless steel F28 with low segregation in the urea reactor solution was studied by means of XPS and AES, in comparison with that of Sanicro28 alloy. The results indicated that the reduce in segregation of P.S and Si causes t
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