Evaluation of Electropolishing Characteristics of 316L Stainless Steel Tube in Contaminated Electrolyte

Pub Date : 2024-04-10 DOI:10.24425/amm.2024.147799
Woo-Chul Jung, Hyunseok Yang, Seon-Jin Choi, Man-Sik Kong
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Abstract

In the electropolishing process, the polishing quality of the metal surface varies according to the contamination of the electrolyte. In this study, the electrolyte was evaluated according to the usage time, and the effect of each factor on electropolishing was investigated. As the electrolyte is contaminated, the concentration of metal ions in the electrolyte increases and the ion conductivity decreases. In addition, the pH and specific gravity of the electrolyte increase due to the metal sludge formed as the metal ion concentration increases. When the electrolyte usage time was more than 5 days, many scratches remained on the surface of 316L stainless steel, and relatively high surface roughness was measured. The surface roughness improvement rate compared to the initial specimen was 30% for the unused electrolyte, 26% on the 3rd day, 19% on the 5th day, and 17.5% on the 13th day. Since the low current density due to electrolyte contamination causes a decrease in polishing efficiency, initial scratches on the metal surface still exist on the polished surface. Therefore, it is necessary to manage the electrolyte to maintain the quality of electropolishing.
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评估 316L 不锈钢管在受污染电解液中的电解抛光特性
在电解抛光过程中,金属表面的抛光质量因电解液的污染程度而异。本研究根据使用时间对电解液进行了评估,并研究了各因素对电解抛光的影响。随着电解液受到污染,电解液中的金属离子浓度增加,离子导电率降低。此外,由于金属离子浓度增加会形成金属淤泥,电解液的 pH 值和比重也会增加。当电解液使用时间超过 5 天时,316L 不锈钢表面会残留许多划痕,测得的表面粗糙度也相对较高。与初始试样相比,未使用电解液时的表面粗糙度改善率为 30%,第 3 天为 26%,第 5 天为 19%,第 13 天为 17.5%。由于电解液污染导致的低电流密度会降低抛光效率,因此抛光后的表面仍然存在金属表面的初始划痕。因此,有必要对电解液进行管理,以保持电抛光的质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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