Study on Microstructure and Property of Hot-dip 55% Al-Zn Alloy Coating on 35CrMo Sucker Rod Surface

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Jing, Wu^1 ; Dong, Liu^2 ; Linlin, Zhang^3 ; Xiaopeng, Yang^2 ; Xu, Chi^2

College of Biology and Environment, Tianjin Vocational Institute, Tianjin

300410, China^1

China Petroleum Pipeline Engineering Co., Ltd International, China^2

Traffic College, Hebei Oriental University, China^3

关键词: Al-Zn coatings;    Corrosion current densities;    Formation process;    Intermediate compound;    Intermediate layers;    Microstructure and properties;    Weight loss;    XRD analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/4/042080/pdf
DOI  :  10.1088/1755-1315/267/4/042080

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The formation process and corrosion resistance of 55%Al-Zn alloy coating for 35CrMo sucker rod are studied in this paper. The study shows that reduction of Si content in coating bath can reduce Fe dissolving and also keep size of sucker rod stable at the same time. The coating is divided into intermediate layer and Al-Zn coating from inside to the outside. The main components of the intermediate compound layer are made up of Fe2Al5, FeAl3 and Al0.5Fe3Si0.5 by XRD analysis. Corrosion results indicate that the ratio of the weight loss between coated and uncoated sucker rod is 5.9:1 and the corrosion current density is 3:1.