Effect of surface roughness of electroplating chromium coated steel on bonding strength of polymer coated steel

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI:10.1177/09673911221102128

Qingdong Zhang, Mingyang Yu, Boyang Zhang, Hao Li

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Abstract

The effect of surface roughness of electroplating chromium coated steel on bonding strength of polymer coated steel has been investigated in this paper. The experimental results have shown that the electroplating chromium coated steel with different surface roughness could be obtained through the substrate surface treatment before the electroplating process. The peeling test results have shown that the peeling force of the polymer coated steel would increase with the increase of surface roughness of the electroplating chromium coated steel, but the increase rate would become slow gradually. With the increase of surface roughness of electroplating chromium coated steel, the PET film would be damaged locally and some polymer residues would remain on the electroplating chromium coated steel; when the bonding force is large enough, the plating shedding would occur on the electroplating chromium coated steel. With the appearance of the polymer residues and the occurrence of plating shedding, the failure mode of polymer coated steel would transform from adhesion failure mode to the mixed failure mode.

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电镀铬涂层钢表面粗糙度对聚合物涂层钢结合强度的影响

研究了电镀铬涂层钢表面粗糙度对聚合物涂层钢结合强度的影响。实验结果表明，在电镀前对基体进行表面处理，可以得到不同表面粗糙度的电镀镀铬钢。剥离试验结果表明，聚合物涂层钢的剥离力随着电镀铬涂层钢表面粗糙度的增加而增加，但增加的速度逐渐变慢。随着电镀镀铬钢表面粗糙度的增大，电镀镀铬钢表面的PET膜会出现局部损伤，并残留一些聚合物残留物;当结合力足够大时，电镀镀铬钢就会发生镀层脱落。随着聚合物残留物的出现和镀层脱落的发生，聚合物涂层钢的失效模式将由附着失效模式转变为混合失效模式。

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Polymers and Polymer Composites

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