苏里格大气田土壤湿度对Q235钢腐蚀行为的影响  

Effect of Soil Humidity at Sulige Gas Field on Corrosion Behavior of Q235 Steel

作　　者：王晶[1] 宋义全[1] 冯佃臣[1] 李涛[1] 李晓刚[2] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]北京科技大学腐蚀与防护中心,北京100083

出　　处：《材料保护》2009年第2期69-71,85,共3页Materials Protection

基　　金：内蒙古自然科学基金资助项目(200408020212);国家自然科学基金资助项目(50461004);教育部“春晖计划”基础研究项目(Z2004-2-15022)

摘　　要：土壤的干湿变化直接影响到土壤中金属材料的腐蚀。为此,应用失重法研究了土壤湿度对Q235钢在苏里格大气田土壤中腐蚀行为的影响,结合电镜、能谱等手段对腐蚀产物进行表征,并对腐蚀机理进行了初步探讨。结果表明:土壤湿度对Q235钢的腐蚀影响很严重,在湿度为10%时,出现最大腐蚀速率。腐蚀形貌观察发现Q235钢点腐蚀倾向较为严重;钢的腐蚀产物主要是铁的氧化物(Fe2O3,Fe3O4)。The effect of the soil of humidity at Sulige Gas Field on the corrosion behavior of Q235 steel was stud-ied using weight loss method.The composition and morphology of the corroded products were analyzed by means of scanning elec-tron microscopy and energy dispersive spectrometry.Results showed that soil humidity had a great impact on the corrosion be-havior of the steel,and the greatest corrosion rate was recorded for the steel at a soil humidity of 10%.Moreover,the Q235 steel was dominated by serious pitting,and the corroded products were mainly composed of iron oxides Fe2O3 and Fe,04.

关 键 词：土壤湿度 Q235钢 腐蚀行为 点腐蚀 腐蚀机理 

分 类 号：TG172.4[金属学及工艺—金属表面处理]