430不锈钢板材显微组织特征及其对腐蚀性能的影响
Microstructure Characteristics and Its Effects on Corrosion of 430 Stainless Steel Plate
李剑平, 李 伟, 张宏宾
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作者单位：(新疆吐哈油田公司, 新疆 哈密 838202)
中文关键字：铁素体不锈钢； 碳化物颗粒； 分层腐蚀； 晶间腐蚀
英文关键字：ferrite stainless steel; carbon particles; layered corrosion; intergranular corrosion
中文摘要：研究了430不锈钢板材热轧态和950 ℃退火5 min后的金相组织特征、晶间腐蚀特征以及在酸性腐蚀介质中的浸泡腐蚀特征。结果表明，热轧态在酸性腐蚀介质中有较明显的分层腐蚀现象，而退火态则为均匀腐蚀。热轧态在0.5 mol/L H2SO4 + 0.01 mol/L KSCN溶液中有明显的晶间腐蚀倾向，而退火态晶间腐蚀现象消除。综合分析表明：实验用钢的腐蚀特征由碳化物条带所致。
英文摘要：The microstructure, inter-crystal corrosion characteristics and corrosion characteristics of 430 stainless steel plate hot-rolled and annealed at 950 ℃ for 5 min in the medium of acid corrosion under larger reduction deformation were researched. The results show that a significant layered corrosion phenomenon of hot-rolled 430 ferrite stainless steel appears in the media of 6%FeCl3 and 10%HCl, but uniformity corrosion in the annealing plate. There is obvious tendency of intergranular corrosion in the 0.5 mol/L H2SO4 + 0.01 mol/L KSCN solution, but eliminates in the state of annealing. Comprehensive analysis shows that a fracture morphology and corrosion characteristics of testing steel is induced by the band of carbon particles.