唐亚陆,汪文兵.不锈钢柠檬酸钝化工艺研究[J].表面技术,2008,37(5):68-70.
TANG Ya-lu,WANG Wen-bing.Study on the Citric Acid Passivation for Stainless Steel[J].Surface Technology,2008,37(5):68-70 |
| 不锈钢柠檬酸钝化工艺研究 |
| Study on the Citric Acid Passivation for Stainless Steel |
| 投稿时间：2008-06-24 修订日期：2008-10-10 |
| DOI： |
| 中文关键词: 不锈钢 柠檬酸 钝化 点腐蚀 电化学交流阻抗 XPS |
| 英文关键词:Stainless steel, Citric Acid Passivation Pitting corrosion EIS XPS |
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| 中文摘要: |
| 研究了不锈钢柠檬酸钝化的工艺，用柠檬酸对不锈钢进行钝化处理，通过电化学技术、浸泡试验对改性后的试样进行耐蚀性测试，并运用XPS技术对表面改性后的不锈钢表面进行了微区成分分析。结果表明：钝化后，不锈钢试样表面由金属氧化物、金属氢氧化物以及少量的金属单质和结晶水组成钝化膜，其耐蚀性大大提高，点蚀电位达到1lOOmV左右，在6% FeCl3溶液中浸泡的腐蚀速率显著低于未钝化试样的腐蚀速率。综合考虑，不锈钢柠檬酸钝化的最佳工艺为：柠檬酸质量分数4%，温度65℃，钝化时间15min，浓硝酸后处理llmin。 |
| 英文摘要: |
| The citric acid passivation process for stainless steel was studied. The anti-corrosion performance of passive film was studied by chemical immersion method and electrochemical method, the surface state of passive film was studied by XPS technology. The results show that passive film is formed with metallic oxides, metallic hydroxides, a spot of metals and crystal water. After passivation, the sample s pitting potential reaches llOOmV, the corrosion rate in FeCl3 solution is smaller obviously than untreated sample. The optimum parameters of passivation in citric acid solution are 4% citric acid, 65℃ , 15min, and the time of post-treatment in 500/o HN03 is llruinutes. |
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