Corrosion Behavior of 316L Stainless Steel Fibers in Sulfuric Acid
摘 要
采用失重法对316L不锈钢纤维在不同浓度和温度硫酸介质中的腐蚀行为进行了研究,应用SEM对试样的腐蚀形貌进行了观察,利用EDS对试样表面腐蚀产物进行了分析.结果表明:在60 ℃和70 ℃的温度下,316L不锈钢纤维的腐蚀速率在30%~40%的硫酸浓度下呈现峰值,之后随硫酸浓度的增加而减小:60 ℃以下,腐蚀速率变化很小,60 ℃以上,腐蚀速率随温度迅速增大.SEM观察发现腐蚀速率较低时,试样表面凸起增多:反之,则凸起几乎全部消失,表面覆盖物增加.成分分析显示:Cr在硫酸中含量几乎不变,Ni的含量减少.
Abstract
Corrosion properties of the 316L stainless steel fiber were studied by the weight loss measuring method in sulfuric acid with various concentrations at different temperatures.The corrosion morphology was observed by SEM and the corrosion products were analyzed by EDS.The results show that the corrosion rate of the 316L stainless steel fiber in 30%-40% sulfuric acid reached the maximum value within the temperature range of 60 ℃ to 70 ℃,and then decreased with increasing the sulfuric acid concentration.When the temperature of solution was below 60 ℃ the corrosion rate changed insignificantly,while the temperature was above 60 ℃,the corrosion rate increased rapidly with increasing temperature.When the corrosion rate was lower,the number of nodules on the fiber increased,while the corrosion rate was higher,the number of nodules became fewer,but the deposition of corrosion product increased.The chromium content kept almost constant after corrosion,but the amount of nickel reduced.
中图分类号 TG172.6
所属栏目 试验研究
基金项目
收稿日期 2008/4/2
修改稿日期 2008/4/24
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引用该论文: ZHANG Xin-wei,SUN Shi-qing,LIANG He,YIN Long-xing. Corrosion Behavior of 316L Stainless Steel Fibers in Sulfuric Acid[J]. Corrosion & Protection, 2009, 30(4): 234~236
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参考文献
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【4】陈庆,时黎霞,藤玉华.介质的成分、浓度和温度对金属材料电化学腐蚀的影响[J].吉林化工学院学报,2000,17(1):63-65.
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