G105钻具用钢在8%KCl溶液中缓蚀剂的研究  

Research on the Corrosive Factors of G105 Steel in 8%KCl Solution

作　　者：何莲[1] 段国强 袁亮[1] 陈为[1] 陈东升[1] 周永璋[1] 

机构地区：[1]南京工业大学环境学院,江苏南京210009 [2]中航新航集团平原航空设备有限公司热表分厂,453019

出　　处：《全面腐蚀控制》2015年第1期67-69,75,共4页Total Corrosion Control

摘　　要：采用旋转挂片法对G105在8%的KCL溶液中的缓蚀剂进行筛选;通过缓蚀剂加入前后极化曲线的变化,分析了缓蚀剂的缓蚀机理;根据滞后环实验,研究了缓蚀剂在8%KCL溶液中对G105的点蚀抑制作用。结果表明:(1)2%含硅复合缓蚀剂(水玻璃)+10mg/L HEDP+15mg/L氯化锌缓蚀效果最好,其缓蚀率高达98.5%;(2)缓蚀剂的加入对腐蚀反应的阴极过程有明显的抑制作用,同时对腐蚀反应的阳极过程也有一定的抑制作用,该缓蚀剂是以抑制阴极过程为主的混合型缓蚀剂;(3)对点蚀有很好的抑制效果。The corrosion inhibitor of G105 steel in 8%KCl solution was selected by weight-loss test（ rotary coupon method）.The relevant corrosion-inhibition mechanism was discussed in terms of the polarization curve, and the restrain action on pitting corrosion of G105 steel in 8%KCl solution was investigated by the hysteresis loop. The result showed that： （1）2% of silicon compound corrosion inhibitor（water glass） ＋ 10 mg/L HEDP ＋ 15 mg/L ZnCl2 had the best effect, the inhibition efficiency was up to 98.5%.（2）The inhibitor can effectively suppress the cathodic process, at the same time, it have an inhibitory effect on the anodic process. It is belong to the mixed corrosion inhibitor. （3）Had a good restrain action on pitting corrosion.

关 键 词：缓蚀剂 腐蚀速率 G105 钢8%KCl 

分 类 号：TG174.42[金属学及工艺—金属表面处理]