新型复合铜缓蚀阻垢剂DG3的研究  

A NEW TYPE OF COMPOSITE CORROSION AND SCALE INHIBITOR FOR COPPER

作　　者：贾丰春[1] 董泉玉[1] 杨从贵[1] 秦广顺 侯立波 

机构地区：[1]大连理工大学化工学院电化学工程系,大连116012 [2]大连大众燃气工程设计研究有限公司,大连116012

出　　处：《腐蚀与防护》2006年第5期237-239,共3页Corrosion & Protection

摘　　要：用电化学方法和失重法研究了一种以缓蚀剂DG1、BTA和阻垢剂PBTCA复配而成的复合缓蚀阻垢剂DG3对锡黄铜的缓蚀作用,并用鼓泡法研究了其阻垢性能。通过实验确定了最佳配方:DG1浓度为2mg/L,BTA浓度为3mg/L,PBTCA浓度为5mg/L。研究表明:这种缓蚀阻垢剂有优良的缓蚀和阻垢性能,锡黄铜在加有DG3的70°C淡水中腐蚀速度为0.0021mm/a,达到且优于国标允许的锡黄铜腐蚀速度(0.005mm/a),而且DG3对缝隙腐蚀也有良好的抑制作用。DG3的阻垢效果与PBTCA相比没有明显降低,30℃时DG3能使淡水中234.04mg/L的钙离子稳定存在,同30℃时5mg/L PBTCA的阻垢能力相当。The performance of a new type composite corrosion and scale inhibitor for copper was investigated by weight-loss, electrochemical and bubbling methods. The new inhibitor, DG3, comprised DG1, BTA and PBTCA. The optimum concentration of every constituent was DG1 2mg/L, BTA 3mg/L and PBTCA 5mg/L. The composite inhibitor exhibited good performance of corrosion and scale inhibition in freshwater. The corrosion rate of tin brass was 0. 0021mm/a in freshwater with DG3, better than the national standard （0. 005mm/a）. DG3 could also inhibit crevice corrosion and crevice corrosion. The performance of scale inhibition of DG3 did not reduce obviously than that of PBTCA. The stabilized concentration of Ca^2＋ could reach 234. 04mg/L in freshwater with DG3, similar to the effect of 5mg/L PBTCA when the temperature was 30℃.

关 键 词：水处理 铜 腐蚀 垢 

分 类 号：TG174.42[金属学及工艺—金属表面处理]