Zirconium-based conversion coating modified by different amount of chitosan on hot-dip Zn-Al alloy coated steel sheet

IF 9.5

Corrosion Communications Pub Date : 2023-09-17 DOI:10.1016/j.corcom.2023.01.004

Jie Pan , Ya-jing Ding , Rui-cheng Zhao , Jian Zhang , Yan Li

{"title":"Zirconium-based conversion coating modified by different amount of chitosan on hot-dip Zn-Al alloy coated steel sheet","authors":"Jie Pan , Ya-jing Ding , Rui-cheng Zhao , Jian Zhang , Yan Li","doi":"10.1016/j.corcom.2023.01.004","DOIUrl":null,"url":null,"abstract":"<div><p>Chitosan (CTS) as an environment-friendly biological macromolecule was applied to investigate its effect in improving the property of zirconium-based Cr(III) conversion coating on Zn-55Al-1.6Si coated steel sheet (Zn55Al). High-resolution transmission electron microscope gave the key evidence that CTS can effectively wrap the main film-forming substances and participate in the construction of Zr@CTS-TCC. A comparative analysis of electrochemical measurements showed that the addition of 0.2 g·L<sup>–1</sup> CTS can improve the corrosion resistance of Zr@CTS-TCC and decrease the surface density of micro defects. Surface spectroscopy characterization provided a theoretical explanation for the role of CTS as an electron supplier in reduction of Cr(VI). Results demonstrate the potential of CTS as an environmentally friendly and effective cross-linking additive, which provides an alternative approach in developing next generation of trivalent chromium or chromium-free passivator for nonferrous alloy and their coatings.</p></div>","PeriodicalId":100337,"journal":{"name":"Corrosion Communications","volume":"12 ","pages":"Pages 1-10"},"PeriodicalIF":9.5000,"publicationDate":"2023-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Corrosion Communications","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S266726692300035X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

Chitosan (CTS) as an environment-friendly biological macromolecule was applied to investigate its effect in improving the property of zirconium-based Cr(III) conversion coating on Zn-55Al-1.6Si coated steel sheet (Zn55Al). High-resolution transmission electron microscope gave the key evidence that CTS can effectively wrap the main film-forming substances and participate in the construction of Zr@CTS-TCC. A comparative analysis of electrochemical measurements showed that the addition of 0.2 g·L^–1 CTS can improve the corrosion resistance of Zr@CTS-TCC and decrease the surface density of micro defects. Surface spectroscopy characterization provided a theoretical explanation for the role of CTS as an electron supplier in reduction of Cr(VI). Results demonstrate the potential of CTS as an environmentally friendly and effective cross-linking additive, which provides an alternative approach in developing next generation of trivalent chromium or chromium-free passivator for nonferrous alloy and their coatings.

查看原文本刊更多论文

不同量壳聚糖改性锆基转化涂层在热镀锌铝合金钢板上的应用

应用壳聚糖（CTS）作为一种环境友好的生物大分子，研究了其对Zn-55Al-1.6Si涂层钢板（Zn55Al）上锆基Cr（III）转化涂层性能的改善作用。高分辨率透射电子显微镜提供了关键证据，证明CTS可以有效包裹主要成膜物质并参与Zr@CTS-TCC.电化学测量的比较分析表明，添加0.2 g·L–1 CTS可以提高Zr@CTS-TCC并降低了微缺陷的表面密度。表面光谱表征为CTS作为电子供应商在Cr（VI）还原中的作用提供了理论解释。结果证明了CTS作为一种环保有效的交联添加剂的潜力，为开发下一代有色合金及其涂层三价铬或无铬钝化剂提供了一种替代方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Corrosion Communications

CiteScore

7.30

自引率

0.00%

发文量