热媒—水换热器水侧的腐蚀与缓蚀剂  

Control the Corrosion in the Water-Containing Part of Heat Medium- Water Heat Exchanger

作　　者：曹殿珍[1] 杨怀玉[1] 祝英剑[1] 陈家坚[1] 高洪雷[1] 万方林[1] 曹家绶[1] 刘莹 孙友才 张永学 刘宗秀 王连才 

机构地区：[1]中国科学院金属腐蚀与防护研究所 [2]中国石油天然气东北输油管理局

出　　处：《油气储运》1996年第11期21-26,共6页Oil & Gas Storage and Transportation

摘　　要：输油站热媒—水换热器的循环水因含氯离子、高溶解氧及高硬度和流速等的作用,引起循环管网严重的腐蚀和结垢。根据实地调查分析,研制出缓蚀阻垢剂IMC-50-S。该水质缓蚀剂选用了在水介质中缓蚀性能优良的无机缓蚀组分和有机膦酸盐为主要缓蚀阻垢成分,可在金属表面形成保护膜,有效地抑制金属的腐蚀。同时,IMC-50-S还具有较高的热稳定性和适应pH值的能力,在高温和较宽pH范围均有良好的阻垢效果。分析了输油站循环水腐蚀试验结果以及缓蚀剂浓度、浸泡时间、溶液pH值对腐蚀速度的影响。试验结果表明,IMC-50-S可使A3钢的腐蚀速度降低到0.07mm/a以下,阻垢率可达90％以上。The recycle water for the heat medium-water heat exchanger in oil transmission stations, featured by high contents of chlorion and dissolved oxygen, high hardness, and high flow velocity, gives rise to severe corrosion and scale buildup in the water piping. The corrosion control and scale arresting agent, IMC-50-S, is developed based on field investigations and analyses. Consisting of inorganic corrosion inhibiting component and organic phosphate which are prone to resistance to corrosive water, the agent can generates a protective film over metallic surface to effectively restrain metallic corrosion. In addition, because of its high thermal stability and adaptability to different pH values, IMC-50-S also has an excellent scale-arresting effect at high temperature and over a wide pH range. Analyzed are the test results about the corrosion of recycle water, the effects on corrosion rate in different concentrations of corrosion inhibitor, different soaking periods, and different pHs of solution. The tests show that, for A3 steel, IMC-50-S can control the corrosion rate down to less than 0. 07 mm/a, and can achieve a scale-arresting rate of over 90%.

关 键 词：换热器 腐蚀 缓蚀剂 防垢剂 输油设备 

分 类 号：TE985.8[石油与天然气工程—石油机械设备]