TITLE:
The Hardness and Corrosion Properties of Trivalent Chromium Hard Chromium
AUTHORS:
Jiazhu Li, Yanjing Li, Xiaohua Tian, Ling Zou, Xing Zhao, Sanfeng Wang, Shenggang Wang
KEYWORDS:
Corrosion Resistance, Nanometer Materials, Hard Chromium, Trivalent Chromium
JOURNAL NAME:
Materials Sciences and Applications,
Vol.8 No.13,
December
11,
2017
ABSTRACT: The formulation of hard
chromium plating from trivalent chromium electrolyte and its related process
have been intensively studied in this work. Through optimized conditions, the
coating hardness can achieve more than HV0.1900 without any
treatment and HV0.11700 after heat treatment for five minutes at
300°C, and the thickness of hard chromium coating was about 100 μm. The hard
chromium coatings show good adhesion on the carbon steel and low alloy
structural steel. The corrosion resistance of hard chromium coatings was
enhanced by the adding nanometer materials into trivalent chromium plating
coatings. More than 120 hours salt spray corrosion resistance can be achieved
with 40 to 50 microns thickness of trivalent chromium plating coatings.