INFLUENCE OF CR-FREE ANTI-FINGERPRINT PASSIVATION FILMS ON THE FRICTION RESISTANCE OF HOT-DIP Al-Zn COATED CARBON STEEL SHEETS

Degao Qiao; Jian Li; Xingchang Tang; Yongjing Shi; Yi Wang; Youzhi Cao; Zhengqian Zhang; Yang Li; Deyi Zhang

doi:10.17222/mit.2025.1392

Degao Qiao Gansu Jiu Gang Group Hongxing Iron and Steel Co., Ltd.,Gansu 73500, China
Jian Li Gansu Jiu Gang Group Hongxing Iron and Steel Co., Ltd.,Gansu 73500, China
Xingchang Tang State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Yongjing Shi Department of Materials Science and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
Yi Wang State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Youzhi Cao State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Zhengqian Zhang State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Yang Li State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Deyi Zhang Gansu Jiu Gang Group Hongxing Iron and Steel Co., Ltd.,Gansu 73500, China

DOI: https://doi.org/10.17222/mit.2025.1392

Keywords: passivation film, hot-dip Al-Zn, carbon steel sheet, friction resistance Trenutno je še zelo malo znanstvenih raziskav in učinkovitih metodologij s katerimi bi lahko

Abstract

Currently, the absence of an effective scientific methodology for evaluating the friction resistance of Cr-free anti-fingerprint Al-Zn coated carbon steel sheets has significantly hindered the qualitative assessment and real-time monitoring of product quality by manufacturers and their downstream users. In this study, we systematically investigate the friction resistance of Al-Zn coated carbon steel sheets treated with three mainstream types of Cr-free anti-fingerprint passivation solutions: polymer-based (Granocoat 621), silane-based (DS981LX), and resin-based (PC-815) passivation solutions, utilizing a high-speed ring-block friction and wear tester. Our experimental results reveal that the friction coefficient curves exhibit a distinct three-stage pattern, corresponding to the sequential wear of the passivation film, the Al-Zn alloy layer, and the underlying carbon steel substrate. Notably, the initial significant increase in the friction coefficient is indicative of a failure of the passivation film due to wear. The friction durability of the Granocoat 621, DS981LX, and PC-815 passivation films was determined to be 287 s, 581 s and 684 s, respectively, with the water-based polyurethane resin-based passivation film (PC-815) demonstrating superior friction resistance. This enhanced performance is attributed to the strong chemical bonding between the water-based polyurethane and the Al-Zn alloy layer, as well as the synergistic effect of the silane coupling agent. These findings provide both theoretical and experimental foundations for establishing a scientifically validated method for evaluating the friction resistance of Cr-free anti-fingerprint Al-Zn coated carbon steel sheets, offering crucial insights for manufacturers aiming to improve the friction resistance of their products.

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INFLUENCE OF CR-FREE ANTI-FINGERPRINT PASSIVATION FILMS ON THE FRICTION RESISTANCE OF HOT-DIP Al-Zn COATED CARBON STEEL SHEETS

Abstract

References

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