海水中碳钢钨系复合缓蚀剂的研究  

Tungstate Species Corrosion Inhibitor for Protection of Carbon Steel in Seawater

作　　者：于静敏[1] 柳鑫华[2] 梁英华[2] 

机构地区：[1]秦皇岛外国语职业学院基础部化学教研室,河北秦皇岛066000 [2]河北理工大学化工与生物技术学院,河北唐山063000

出　　处：《材料保护》2007年第2期17-19,共3页Materials Protection

摘　　要：通过旋转挂片试验,筛选出了新型的具有良好缓蚀性能的钨系海水处理剂,并通过动电位极化曲线测试初步探讨了该海水处理剂的缓蚀机理。结果表明,在本试验条件下,单一钨酸钠在海水中的临界缓蚀浓度为40mg/L;复合钨系碳钢缓蚀剂的缓蚀率大于90%。该钨系海水处理剂对阴极、阳极均有抑制作用,但以抑制阳极为主。该海水处理剂高效、低毒,对环境友好。其较合适的浓度配比为40mg/L钨酸钠,40mg/L聚天冬氨酸,10mg/L羟基乙叉二膦酸(HEDP),3mg/LZn2+。A series of rotary coupon - hanging tests was performed to screen a novel tungstate- based inhibitor with good corrosion-inhibition capability for carbon steel in seawater treatment. The optimized formulation of the tungstate - based inhibitor for seawater treatment was established, while its corrosion - inhibition mechanisms were primarily discussed in connection with the measurement of the potentiodynamic polarization curve. It was found that the critical concentration of single tungstate corrosion - inhibition agent in seawater was as much as 40 mg/L under the selected test conditions, and the corrosion-inhibition efficiency of the composite tungstate-based corrosion - inhibition agent for carbon steel in seawater was over 90%. Moreover, the titled inhibitor was effective in inhibiting both the anodic and cathodic processes, with the inhibition for the anodic process to be dominant. Moreover, the newly developed inhibitor had the advantages of high efficiency, low toxicity, and environmental acceptance. The optimized formulation for the newly developed inhibitor was suggested to be composed of 40 mg/L of tungstate, 40 mg/L of polyaspartic acid, 10 mg/L of 1 - hydroxy ethylidene -1,1- diphosphonic acid ( HEDP) ,and 3 mg/L of Zn2+.

关 键 词：海水 缓蚀剂 碳钢 钨酸钠 聚天冬氨酸 缓蚀机理 

分 类 号：TG174.42[金属学及工艺—金属表面处理]