Corrosion Behavior of Nickel Alloy (ASTM A 494 M) Reinforced with Fused SiO2 Chilled Metal Matrix Composites (MMCs) for Marine Applications

International Conference on Materials, Alloys and Experimental Mechanics 2017

材料科学;金属学;机械制造

Hemanth, Joel^1

HMS Institute of Technology, Tumkur, Karnataka, India^1

关键词: Corrosion attack;    Corrosion behavior;    Protective layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/225/1/012192/pdf
DOI  :  10.1088/1757-899X/225/1/012192

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This paper presents the results obtained and the discussions made from a series of corrosion experiments involving Nickel alloy (ASTM A 494 M) reinforced with fused SiO2, size of the particles dispersed varies from 80-120 μm and amount of addition varies from 3 to 12 wt.% in steps of 3 wt.%. The resulting chilled MMCs are solidified under the influence of copper chill of 25 mm thickness to study the effect of corrosion behavior. Corrosion resistance was found to increase significantly with increase in SiO2content in chilled MMCs. Nevertheless, even with high SiO2content corrosion attack ie., pitting was found to be most severe during the initial stages of each test but it invariably decreased to a very low value in the later stages, due to the formation of an adherent protective layer on the MMCs developed.