Micromorphology and wear resistance of selective electrochemically deposited nickel coating

doi:10.13251/j.issn.0254-6051.2021.12.023

Abstract

Abstract: Nickel coating was deposited on the 45 steel substrate by the selective electrochemical deposition technique, the growth law of the electrochemical deposited nickel coating in the selected area was explored by the morphology observation and energy spectrum analysis, and the wear resistance of the coating and the substrate was compared. The results show that the growth process selective electrochemical deposition is gradual by stacking of small particles into a dense coating; the growth of the grains is spirally stacked, with microcracks inside and on the surface of the spherical grains. Oxygen is present in the gaps between the grains, and oxidation reaction inhibits the mutual fusion of small crystal grains; the structure of electrochemically deposited nickel coatings in selected areas is denser, and there is a clear boundary between the coating structure and the matrix structure, and the coating structure has better wear resistance than the matrix material.

Key words: selective electrochemical deposition, nickel coating, micromorphology, wear resistance

CLC Number:

TQ153.1⁺2

Bai Xuechen, Liang Guoxing, Lü Ming. Micromorphology and wear resistance of selective electrochemically deposited nickel coating[J]. Heat Treatment of Metals, 2021, 46(12): 142-148.

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