碳酰A对间冷机组循环水系统的缓蚀性能研究  

Study on the Corrosion Inhibition Performance of Carbonyl A in the Recirculating Water System of Indirect Air-Cooling Units

作　　者：刘江 治卿 胡学超 王焕伟 LIU Jiang;ZHI Qing;HU Xuechao;WANG Huanwei(Inner Mongolia Power(Group)Co.,Ltd.,Inner Mongolia Electric Power Research Institute,Huhhot 010020,China)

机构地区：[1]内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司,内蒙古呼和浩特010020

出　　处：《材料保护》2025年第4期158-166,共9页Materials Protection

基　　金：内蒙古电力集团(有限)责任公司内蒙古电力科学研究院分公司自筹科技项目资助(2023-ZC-1-04)。

摘　　要：间接式空冷系统占据国内空冷机型的主导地位,但庞大的铝质散热器存在严重的腐蚀问题。基于环境、经济等多方面考虑,本工作提出并实际应用了一种环保缓蚀剂碳酰A,通过电化学测试、试样失重以及金属表面形貌特征分析研究了碳酰A对循环水中1050A铝、304不锈钢、Q235碳钢的缓蚀性能。结果表明:碳酰A的加入可有效抑制1050A铝、304不锈钢、Q235碳钢的腐蚀;其缓蚀机理为减少了金属的吸氧腐蚀、并在金属表面形成了一层保护膜而起到了缓蚀作用。现场实际运行监测数据表明,加入碳酰A调节剂后机组循环水体系的pH值小于8.5,Al^(3+)浓度从超过460μg/L下降为11~47μg/L;大修检查结果表明,1050A铝换热管内壁光滑,无锈蚀斑块、无腐蚀产物沉积,防腐效果显著。Indirect air-cooling systems dominate the domestic air-cooling models,but the huge aluminum radiators have serious corrosion problems.Considering various factors such as environmental and economic aspects,this study proposed and applied an environmentally friendly corrosion inhibitor,Carbonyl A.The corrosion inhibition performance of Carbonyl A on 1050A aluminum,304 stainless steel,and Q235 carbon steel in the circulating water system was studied through electrochemical testing,weight loss measurements,and surface morphology analysis of the metal samples.Results showed that the addition of Carbonyl A effectively inhibited the corrosion of 1050A aluminum,304 stainless steel,and Q235 carbon steel.The corrosion inhibition mechanism was found to be the reduction of oxygen absorption corrosion on the metal surface and the formation of a protective film,which contributed to the inhibition effect.On-site operational monitoring data indicated that after the addition of the Carbonyl Aregulator,the pH value of the circulating water system was maintained below 8.5,and the concentration of Al^(3+) de-creased from over 460μg/L to 11~47μg/L.Overhaul inspection results revealed that the inner surface of the 1050A aluminum heat exchanger tubes was smooth,with no rust spots or corrosion product deposits,demonstrating significant anticorrosive effects.

关 键 词：间接空冷 缓蚀剂 碳酰A 循环水 1050A铝 腐蚀 

分 类 号：TG174.42[金属学及工艺—金属表面处理]