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The Hardness and Corrosion Properties of Trivalent Chromium Hard Chromium
Beijing Blue Chemicals Centre, Beijing, China
Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
Institute of Metal Research, Chinese Academy Sciences, Beijing, China
- 1 Beijing Blue Chemicals Centre, Beijing, China
- 2 Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
- 3 Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
- 4 Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
- 5 Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
- 6 Prof. Jiazhu Li Laboratory, Wuhan Desytek Environment Protection & New Materials Co, Ltd, Wuhan, China
- 7 Institute of Metal Research, Chinese Academy Sciences, Beijing, China
Materials Sciences and Applications·Volume 08 (2017)·Pages 1014–1026·Published 7 December 2017·DOI10.4236/msa.2017.813074
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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 HV 0.1 900 without any treatment and HV 0.1 1700 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.
KeywordsCorrosion ResistanceNanometer MaterialsHard ChromiumTrivalent Chromium
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