首页> 外文期刊>International Journal of Electrochemical Science >Galvanic Corrosion of the Base AISI 316l/Micro-Plasma Arc Welded AISI 316l in Polluted Phosphoric Acid Media at Different Temperatures
【24h】

Galvanic Corrosion of the Base AISI 316l/Micro-Plasma Arc Welded AISI 316l in Polluted Phosphoric Acid Media at Different Temperatures

机译:AISI 316l /微等离子弧焊AISI 316l在不同温度的磷酸介质中的电化腐蚀

获取原文
           

摘要

In this work, the galvanic corrosion of the base AISI 316L stainless steel/micro-plasma arc weldedAISI 316L stainless steel in phosphoric acid solutions polluted with sulphuric acid and chlorides wasstudied by means of the Zero-Resistance Ammeter technique. Experiments were performed at differenttemperatures (25, 40 and 60 C) under flowing conditions (Reynolds number of 1456). Galvaniccurrent density values are negative during the first hour of the test indicating that the welded alloy iscorroding; then, they shift towards positive values indicating that the base stainless steel corrodes.Galvanic current density values reached stable values from the third hour of the tests performed at 25and 40 C, and during the last two hours of the test at 60 C indicating passivation of the base alloy.Uniform corrosion processes occur for the AISI 316L alloy in polluted phosphoric acid solutions.Galvanic current densities increase with temperature according to Arrhenius plot. Impurities seem toincrease galvanic corrosion and hinder passivation processes.
机译:在这项工作中,通过零电阻安培计技术研究了基础AISI 316L不锈钢/等离子弧焊接AISI 316L不锈钢在被硫酸和氯化物污染的磷酸溶液中的电化腐蚀。在流动条件下(雷诺数1456)在不同温度(25、40和60℃)下进行实验。在测试的第一个小时内,电流电流密度值为负,表明焊接的合金正在腐蚀;然后,它们向正值偏移,表明基础不锈钢被腐蚀。从25和40 C下进行测试的第三个小时开始,以及在60 C下测试的最后两个小时内,电镀电流密度值达到稳定值,表明钝化了AISI 316L合金在受污染的磷酸溶液中会发生均匀的腐蚀过程。根据Arrhenius曲线,电流的电流密度随温度的升高而增加。杂质似乎会增加电腐蚀并阻碍钝化过程。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号