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Metals 2019, 9(2), 208; https://doi.org/10.3390/met9020208

A Study on the Wettability of Ion-Implanted Stainless and Bearing Steels

1
,
1
and
1,2,*
1
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
2
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
*
Author to whom correspondence should be addressed.
Received: 20 December 2018 / Revised: 30 January 2019 / Accepted: 8 February 2019 / Published: 10 February 2019
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Abstract

To satisfy the harsh service demand of stainless steel and aviation bearing steel, the anticorrosion and wettability behaviors of 9Cr18 stainless steel and M50 bearing steel tailored by ion beam surface modification technology were experimentally investigated. By controlling the ion implantation (F+, N+, N+ + Ti+) or deposition processes, different surface-modified layers and ceramic layers or composite layers with both effects (ion implantation and deposition processes) were obtained on metal surfaces. The wettability was characterized by a contact angle instrument, and the thermodynamics stabilization of ion implantation-treated metals in corrosive solution was evaluated through an electrochemical technique. X-ray photoelectron spectroscopy (XPS) was employed for detecting the chemical bonding states of the implanted elements. The results indicated that ion implantation or deposition-induced surface-modified layers or coating layers could increase water contact angles, namely improving hydrophobicity as well as thermodynamic stabilization in corrosive medium. Meanwhile, wettability with lubricant oil was almost not changed. The implanted elements could induce the formation of new phases in the near-surface region of metals, and the wettability behaviors were closely related to the as-formed ceramic components and amorphous sublayer. View Full-Text
Keywords: ion implantation; M50 steel; wettability; DLC coating; contact angle ion implantation; M50 steel; wettability; DLC coating; contact angle
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Chen, X.; Yin, X.; Jin, J. A Study on the Wettability of Ion-Implanted Stainless and Bearing Steels. Metals 2019, 9, 208.

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