Enhancing General Corrosion Resistance of Biomedical High Nitrogen Nickel-Free Stainless Steel by Nitric Acid Passivation

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2020,（2）
• 页码范围: 307-312
• 页数: 6页
• 语种: 英文

摘要

A systematic study of nitric acid passivation was investigated to enhance the general corrosion resistance of biomedical high-nitrogen nickel-free stainless steels (HNSs).After passivation,the corrosion rate of HNS could dramatically reduce to 1/20 of the untreated in 37 ℃ 0.9 wt％ NaC1 solutions.Then,the passive film on HNS was analyzed by X-ray photoelectron spectroscopy.It was found that chromium enrichment in the passive film and nitrogen enrichment in the film/metal interface contributed to the improvement in general corrosion resistance of HNS.