文章基本信息

标题：Comparative Performance of Coatings for ASTMa106b Low Alloy Steel
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作者：Muhammad Mumtaz Mirza ; Anjali Desilva ; Elansezhian Rasu 等
期刊名称：Current Journal of Applied Science and Technology
印刷版ISSN：2457-1024
出版年度：2017
卷号：18
期号：5
页码：1-24
语种：English
出版社：Sciencedomain International
摘要：The study investigates the coating performance of oil pipelines. To examine the coating parameters, different type of coatings were developed based on paint group and electroless nickel phosphorous group (Electroless Ni-P) with or without nano additives. The substrate considered was low alloy steel ASTM A106B oil pipeline sample. The comparative performance of coatings was reported and concluded through mechanical, characterization and corrosion resistance evaluation.The substrates after chemical and mechanical polishing were coated with paint group comprised of organic paint, zinc paint and aluminum oxide paint with or without nano additives like nano Al2O3, nano ZnO and nano CuO. Similarly, Electroless Ni-P group coated samples were also prepared for the same nano additives. To identify the coating performance different concentrations of nano additives i.e 0.5, 1, 1.5 and 2% were used against paint and Electroless Ni-P group. Based on the concentration performance, 1% nano additive was reported with optimum performance established through surface finish, micro hardness and corrosion resistance values.The characterization evaluation of the coated samples was studied using Scanning Electron Microscope and Optical Microscope to study surface morphology. To confirm the percentage of elements in coatings, Energy Dispersive X-ray test was also performed. To examine corrosion rate, three different test such as Atmospheric exposure test, Potentio-stat test and wet/dry test were also conducted. To evaluate the mechanical evaluation, hardness test, surface roughness test and coating thickness test were conducted.After investigation, it was revealed that the overall investigation of Electroless Ni-P group was better than the paint group. The observed results demonstrates the mechanical and characterization evaluation for nano Al2O3 better than the other nano additives. However, coating efficiency was around 24.7% it means rest of nickel was wasted in the electrolyte. To evaluate the corrosion rate, Electroless Ni-P with nano Al2O3 was 0.0353 mmpy followed by Electroless Ni-P with nano ZnO was 0.0412 mmpy and for Electroless Ni-P with nano CuO was 0.0471 mmpy. After adding Electroless Ni-P with nano Al2O3, corrosion rate was improved by 58.12% as compared to without addition of nano particles.
关键词：Nano additives;corrosion;tribology;surface morphology;low alloy steel