摘要
利用化学浸泡法研究分析430、409L、410S铁素体不锈钢热轧板材在不同温度,不同浓度硫酸溶液中的腐蚀行为,并与304奥氏体不锈钢热轧板材做对比。结果表明:耐硫酸腐蚀性能304>430>409L>410S,奥氏体不锈钢的耐硫酸腐蚀性优于铁素体不锈钢,较低的碳含量和Ti元素的加入提高了409L的耐蚀性,410S中的马氏体降低了它的耐蚀性。硫酸溶液腐蚀性10%H_2SO_4>60%H_2SO_4>80%H_2SO_4,10%H_2SO_4、60%H_2SO_4,属于还原性酸,80%H_2SO_4属于氧化性酸。各钢种在10%H_2SO_4溶液中的微观腐蚀形貌与其金相组织具有对应性,这说明材料的微观组织对其耐腐蚀性有直接影响。
The corrosion behaviors of hot-rolled ferrite stainless steel plates （430, 409L and 410S） were studied by chemical immersion methods in sulfuric acid solution at different concentrations and temperatures, which was compared with 304 austenite stainless steel hot-rolled plates under same conditions. The results show that： the ascending order for corrosion resistance in sulfuric acid solution is 304,430,409L and 410S. The austenite stainless steel is superior to ferrite stainless steel on sulfuric acid proofness. The corrosion resistance of 409L is increased by the addition of low carbon content and titanium. Because of martensite phase, the corrosion resistance of 410S decreases. In different steels, the causticity of sulfuric acid solution with different concentrations can be ranked as 10%H2SO4, 60%HZSO4 and 80%H2SO4 in ascending order. 10%H2SO4 and 60% are reductive acid, while 80%H2SO4 is oxidative acid. According to the correspondence between microcosmic pitting morphology and metallurgical structure for these steels at 10% H2SO4 solution, the microstructure of the steel plates can directly influence its corrosion resistance.
出处
《热加工工艺》
CSCD
北大核心
2015年第22期60-63,68,共5页
Hot Working Technology
基金
酒钢集团科技项目([2015]9号)
关键词
不锈钢
化学浸泡腐蚀
硫酸溶液
微观腐蚀形貌
stainless steel
chemical immersion corrosion
sulfuric acid solution
micro-pitting morphology
