Humic acid as eco‐friendly corrosion inhibitor for EH40 ship plate steel

IF 1.6 4区化学 Q4 CHEMISTRY, PHYSICAL

Surface and Interface Analysis Pub Date : 2024-05-25 DOI:10.1002/sia.7335

Sizhu Wang, Zhipeng Liang, Yiyong Wang, Hui Jin, Shengli Li, Rui Guan

引用次数: 0

Abstract

In this study, a new type of green corrosion inhibitor, namely, sodium humate (SH), was extracted from humus soil, which is a natural humus plant, by dissolution‐neutralization, and then used for corrosion inhibition of low carbon steel in seawater. The corrosion inhibition performance of SH on low carbon steel EH40 in seawater was tested by weight loss method and electrochemical technology. The surface and corrosion products of low carbon steel were observed and analyzed by scanning electron microscope (SEM), atomic force microscope (AFM), contact angle and X‐ray photoelectron spectroscopy (XPS). The results show that SH is a mixed corrosion inhibitor, and the optimum concentration is 2 g L−1. At this concentration, the inhibition rate can reach 93.6%. It mainly affects the semi‐reaction of cathodic corrosion. By forming a corrosion protection layer with uniform adsorption on the surface of EH40 steel, EH40 steel becomes more resistant to seawater corrosion.

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腐植酸作为 EH40 船板钢的环保型缓蚀剂

本研究采用溶解-中和的方法，从天然腐殖质植物--腐殖土中提取了一种新型绿色缓蚀剂--腐殖酸钠（SH），并将其用于海水中低碳钢的缓蚀。采用失重法和电化学技术测试了 SH 对海水中低碳钢 EH40 的缓蚀性能。通过扫描电子显微镜（SEM）、原子力显微镜（AFM）、接触角和 X 射线光电子能谱（XPS）对低碳钢的表面和腐蚀产物进行了观察和分析。结果表明，SH 是一种混合缓蚀剂，最佳浓度为 2 g L-1。在此浓度下，抑制率可达 93.6%。它主要影响阴极腐蚀的半反应。通过在 EH40 钢表面形成均匀吸附的腐蚀保护层，提高了 EH40 钢的耐海水腐蚀能力。

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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来源期刊

Surface and Interface Analysis 化学-物理化学

CiteScore

3.30

自引率

5.90%

发文量

130

审稿时长

4.4 months

期刊介绍： Surface and Interface Analysis is devoted to the publication of papers dealing with the development and application of techniques for the characterization of surfaces, interfaces and thin films. Papers dealing with standardization and quantification are particularly welcome, and also those which deal with the application of these techniques to industrial problems. Papers dealing with the purely theoretical aspects of the technique will also be considered. Review articles will be published; prior consultation with one of the Editors is advised in these cases. Papers must clearly be of scientific value in the field and will be submitted to two independent referees. Contributions must be in English and must not have been published elsewhere, and authors must agree not to communicate the same material for publication to any other journal. Authors are invited to submit their papers for publication to John Watts (UK only), Jose Sanz (Rest of Europe), John T. Grant (all non-European countries, except Japan) or R. Shimizu (Japan only).