文献类型：期刊文献

中文题名：镍–磷–二氧化硅复合镀层在模拟地热水中的腐蚀与结垢行为

英文题名：Corrosion and fouling behavior of nickel–phosphorus–silica composite coating in simulated geothermal water

作者：程子非[1];金文倩[2];马春红[2];莫东平[2];侯峰[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237;[2]中国石化集团新星石油有限责任公司,北京100083

年份：2015

卷号：34

期号：21

起止页码：1211

中文期刊名：电镀与涂饰

外文期刊名：Electroplating & Finishing

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：中石化新星石油公司科技开发项目(10500000-13-ZC0607-0006)

语种：中文

中文关键词：镍-磷合金;化学镀;二氧化硅;复合镀层;不锈钢;地热水;防腐;阻垢

外文关键词：nickel-phosphorus alloy; electroless plating; silica; composite coating; stainless steel; geothermal water; corrosionresistance; scale inhibition

摘要：地热系统的腐蚀与结垢严重影响了地热资源的开发利用。为了解决该问题,在20碳钢基底上进行化学镀,制备了Ni–P–SiO_2复合镀层,通过对流传热阻垢试验对比研究了浸泡于模拟地热水中的Ni–P–SiO_2复合镀层和316不锈钢的污垢诱导期、污垢热阻和传热系数,采用扫描电镜(SEM)、X射线衍射(XRD)和能谱仪(EDS)对2种材料的表面污垢层进行了表征,利用全浸腐蚀试验和电化学测试研究了其在模拟地热水中的耐蚀性能。结果表明,Ni–P–SiO_2复合镀层的表面污垢主要是文石和球霰石,分布不均匀,易剥离,而316不锈钢表面生成的污垢主要是方解石和文石,分布集中,不易剥离。相比于316不锈钢,Ni–P–SiO_2复合镀层的污垢诱导期得到延长,污垢热阻减小,传热系数增大,自腐蚀电流密度减小,阻抗值增大,表现出更加优异的耐蚀阻垢性能。
The corrosion and fouling of a geothermal system seriously affect the development and utilization of geothermal resource. To resolve these problems, a Ni-P-SiO2 composite coating was prepared on the surface of 20 carbon steel substrate by electroless plating. The fouling induction period, thermal resistance difference between before and after fouling, and heat transfer coefficient of Ni-P-SiO2 composite coating and 316 stainless steel immersed in simulated geothermal water were comparatively studied by convection heat transfer scale inhibition test. The scales formed on both materials were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, and energy-dispersive spectroscopy （EDS）, and their corrosion resistance in simulated geothermal water was examined by immersion corrosion test and electrochemical measurements. The results showed that the scales formed on Ni-P-SiO2 composite coating mainly consist of aragonite and vaterite, which distribute ununiformly and peel off easily. The scales formed on 316 stainless steel are mainly calcite and aragonite, featuring connected distribution and being difficult to peel off. As compared with 316 stainless steel, Ni-P-SiO2 composite coating has a better corrosion resistance and scale inhibition, as shown by a longer fouling introduction period, a less variation in thermal resistance after fouling, a higher coefficient of heat transfer, a lower corrosion current density, and a higher impedance.