海水循环冷却系统铜合金缓蚀剂研究  

CORROSION INHIBITION OF BRASS IN RECIRCULATING COOLING SEAWATER SYSTEM

作　　者：王维珍[1] 侯纯扬[1] 武杰[1] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《水处理技术》2012年第5期11-14,共4页Technology of Water Treatment

基　　金：国家"十一五"科技支撑计划课题(2006BAB03A07);天津市"十一五"科技支撑计划课题(07ZCKFSH01800);国家海洋公益性行业科研专项(201005023)

摘　　要：应用腐蚀失重、弱极化和动态极化曲线等方法,重点研究了黄铜H68A在不同浓缩倍数海水中的腐蚀行为及其缓蚀剂。腐蚀研究结果表明,黄铜H68A的腐蚀速率随时间的延长逐渐降低,温度升高腐蚀速率在50℃达到最大,随浓缩倍数的增大腐蚀速率降低,原海水中腐蚀最重;缓蚀剂研究表明,有机缓蚀剂和无机缓蚀剂复合使用,协同效应明显。采用高复合预膜缓蚀剂含量处理,再在相对低复合缓蚀剂含量正常运行,浓缩倍数N≤2.0时,黄铜H68A、HSn70和HSn62的腐蚀率≤0.01 mm/a,腐蚀得到有效控制。A study on the corrosion behavior and corrosion inhibition of brass H68A in different cycle of concentration seawater was carried out by means of weight loss and electrochemistry techniques including free corrosion potential,weak polarization and potentiodynamic polarization.Results showed that the brass corrosion rate decreased gradually with time extend,and when temperature rised corrosion rate increased rapidly.However,corrosion rate was maximum at 50 ℃ point.with cycle of concentration seawater increased corrosion rate decreases.Obviously,corrosion rate of brass was most serious in seawater.The further study of corrosion inhibition showed that scale of organic and inorganic corrosion inhibition played a important role in synergistic effect.Corrosion rate of brass was not beyond 0.01 mm/a could be meet through adding corrosion inhibition to different cycle of concentration seawater.

关 键 词：海水 循环冷却 铜合金 腐蚀 复合缓蚀剂 

分 类 号：TG174.42[金属学及工艺—金属表面处理]