X70管线钢盐雾腐蚀性能  

Salt Spray Corrosion Performance of X70 Pipeline Steel

作　　者：黄敦伟 胡爱萍[1] 孔德军[1] 张宏伟 

机构地区：[1]常州大学机械工程学院,常州213016 [2]常州阳光渗铝钢有限公司,常州213104

出　　处：《腐蚀与防护》2014年第1期69-73,共5页Corrosion & Protection

摘　　要：采用中性盐雾对X70管线钢进行室温腐蚀,采用SEM和EDS观察了X70管线钢经盐雾腐蚀处理前后表面微观形貌和化学组成的变化。结果表明,盐雾腐蚀后试样表面化学元素均匀性和结构完整性均被破坏,表面点蚀较为严重,出现了大量的点蚀坑;腐蚀后试样表面含铁量高,产生了活性铁原子,并与腐蚀性介质Cl-发生接触反应,是盐雾腐蚀发生点蚀主要原因。The salt spray corrosion testing of X70 pipeline steel was conducted. The changes （ff morphologies and chemical elements of X70 pipeline steel before and after salt spray corrosion test were observed hy SEM and EDS. The rcsuhs show that pitting corrosion of the sltmplc is relatively serious after the salt spray corrosion, and the uniformity and integrity of the surface of the sample were damaged and ninny pits were formed on the surface after the sah-spray test. ＂The content of Fe in tilt, sample wits high, which could produce acuve iron atoms. The reactkm of active iron aloms with lhe corrosive mediunt CI ions wits the main factor of pitting corrosion.

关 键 词：X70管线钢 盐雾腐蚀 面扫描 能谱分析 

分 类 号：TG174[金属学及工艺—金属表面处理]