Corrosion inhibition capabilities of aluminium thin films on AZ31 magnesium alloy

IF 1.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Technology Pub Date : 2023-06-27 DOI:10.1080/02670836.2023.2226487

Sundeep Kumar Marndi, Pachaiappan Raman, Amirthapandian Sankarakumar, Ponpandian Nagamony, P. Thangadurai

引用次数: 0

Abstract

Al coating of varying thicknesses in the 50 to 200 nm range was coated on AZ31 Mg alloys to improve its corrosion capabilities. The thermal evaporation method is used for coating AZ31 Mg alloys. GIXRD, SEM, AFM and XEDS studied the structure, microstructure, and chemical analysis. GIXRD studies showed an amorphous thin film on the surface. AFM showed that the surface roughness increases with the coating thickness. Corrosion studies were done by electrochemical analysis in 3.5 wt-% NaCl environment. The Al coating has improved the corrosion resistance of the AZ31 alloy to the best with the lowest corrosion rate 0.07 mmpy, with the corrosion current density and corrosion potential of 0.32 × 10−5 A/cm2 and −1.17 V, respectively. GRAPHICAL ABSTRACT

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铝薄膜对AZ31镁合金的缓蚀性能

在AZ31镁合金表面涂覆50 ~ 200 nm范围内不同厚度的Al涂层，以提高AZ31镁合金的腐蚀性能。采用热蒸发法对AZ31镁合金进行涂层处理。GIXRD, SEM, AFM和XEDS研究了其结构，微观结构和化学分析。GIXRD研究表明，表面有非晶薄膜。AFM分析表明，表面粗糙度随涂层厚度的增加而增大。在3.5 wt-% NaCl环境中进行了电化学腐蚀研究。Al涂层可使AZ31合金的耐蚀性达到最佳，腐蚀速率最低，为0.07 mmpy，腐蚀电流密度和腐蚀电位分别为0.32 × 10−5 A/cm2和−1.17 V。图形抽象

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来源期刊

Materials Science and Technology 工程技术-材料科学：综合

CiteScore

2.70

自引率

5.60%

发文量

审稿时长

3 months

期刊介绍：《Materials Science and Technology》（MST） is an international forum for the publication of refereed contributions covering fundamental and technological aspects of materials science and engineering.