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首页> 外文期刊>Corrosion Engineering, Science and Technology >Corrosion of AISI 316 stainless steel containing Cu and Sn in acid media
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Corrosion of AISI 316 stainless steel containing Cu and Sn in acid media

机译：含铜和锡的AISI 316不锈钢在酸性介质中的腐蚀

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摘要

The influence of Cu and Sn additions on the corrosion resistance of AISI 316 stainless steels has been evaluated in various acid media (boiling 50 wt- percent H_3PO_4, boiling 65 wt- percent HNO_3, 3 wt- percent HCI at 25 deg C and 30 wt- percent H_2SO_4 at 50 deg C). A kinetic study of the corrosion process was carried out using gravimetric tests. The nature of the corrosion products was analysed by SEM, X-ray mapping and X-ray photoelectron spectroscopy both before and after accelerated corrosion tests. The steels displayed high chemical resistance to the nitric, hydrochloric and phosphoric acid media. An increase in Cu and Sn concentration did not significantly affect the corrosion resistance in boiling 50 wt- percent phosphoric acid, boiling 65 wt- percent nitric acid or 3 wt- percent hydrochloric acid. The behaviour of AISI 316 in sulphuric acid solution was greatly improved by increasing the Cu concentration, whether alone or in combination with Sn. The effect of Sn addition in decreasing the corrosion rate was minor in comparison with that of Cu.
机译：已在各种酸性介质中（沸点为50 wt％的H_3PO_4，沸点65 wt％的HNO_3、3 wt％的HCl在25摄氏度和30 wt％下）评估了Cu和Sn的添加对AISI 316不锈钢耐腐蚀性的影响。 -在50摄氏度时H_2SO_4的百分比）。使用重量测试进行了腐蚀过程的动力学研究。在加速腐蚀试验之前和之后，通过SEM，X射线作图和X射线光电子能谱分析腐蚀产物的性质。这些钢对硝酸，盐酸和磷酸介质表现出很高的耐化学性。 Cu和Sn浓度的增加对沸腾50％（重量）的磷酸，沸腾65％（重量）的硝酸或3％（重量）的盐酸的耐腐蚀性没有明显的影响。通过增加铜的浓度，无论是单独使用还是与锡结合使用，都可以大大改善AISI 316在硫酸溶液中的行为。与Cu相比，Sn添加对降低腐蚀速率的影响很小。

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