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Effects of NiSO4 Concentration on the Coloring Performance and Corrosion Resistance of the Colored Film on 304 Stainless Steel

1
SJ Petroleum Machinery Co., Sinopec, No.1 Longshansi, Jingzhou 434024, China
2
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory of Green Preparation and Application for Materials, Ministry of Education, Hubei Key Laboratory of Polymer Materials, Hubei University, 368 Youyi Road, Wuhan 430062, China
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(6), 598; https://doi.org/10.3390/coatings10060598
Received: 22 May 2020 / Revised: 15 June 2020 / Accepted: 17 June 2020 / Published: 25 June 2020
The colored films were successfully prepared on the 304 stainless steel surfaces in coloring solutions with different NiSO4 contents. The purpose of this study was to investigate the effects of NiSO4 in the coloring solution on the coloring performance of 304 stainless steel and corrosion resistance of the obtained colored film in NaCl solution. The coloring rate was determined from coloring potential-time curve, and the protection properties of the color films in a 3.5% NaCl solution were characterized by potentiodynamic polarization scan, electrochemical impedance spectroscopy, and wear resistance test. The results showed that adding NiSO4 could accelerate the coloring process but brought about a negative impact on the surface’s corrosion resistance. View Full-Text
Keywords: stainless steel; colored film; corrosion resistance; NaCl solution stainless steel; colored film; corrosion resistance; NaCl solution
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Li, W.; Qu, J.-E.; Cao, Z.; Wang, H. Effects of NiSO4 Concentration on the Coloring Performance and Corrosion Resistance of the Colored Film on 304 Stainless Steel. Coatings 2020, 10, 598.

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