Filiform Corrosion Inhibition of Zn–Al–Mg-Coated Steel by Ti–Zr Conversion Coating: Crucial Role of Benzotriazole-5-Carboxylic Acid

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-07-04 DOI:10.1021/acs.langmuir.5c00791

Haiqing Liu, Muhammad Jawad, Jingmao Zhao*, Baomin Fan*, Mohammad Tabish, Muhammad Mubeen, Mubashar Mahmood and Jingbao Wang,

{"title":"Filiform Corrosion Inhibition of Zn–Al–Mg-Coated Steel by Ti–Zr Conversion Coating: Crucial Role of Benzotriazole-5-Carboxylic Acid","authors":"Haiqing Liu, Muhammad Jawad, Jingmao Zhao*, Baomin Fan*, Mohammad Tabish, Muhammad Mubeen, Mubashar Mahmood and Jingbao Wang, ","doi":"10.1021/acs.langmuir.5c00791","DOIUrl":null,"url":null,"abstract":"<p >Under-film filiform corrosion (FFC) poses a significant challenge to the durability and reliability of Zn–Al–Mg-coated steel (ZM-steel), necessitating the development of advanced protective strategies. Herein, benzotriazole 5-carboxylic acid (BTC)-modified titanium zirconium (TiZr) conversion coatings (CCs) were developed as a sustainable solution to mitigate FFC, enhance corrosion resistance, and improve the adhesion of epoxy (EP) coatings on ZM-steel. Through electrochemical impedance spectroscopy, potentiodynamic polarization, FFC, and neutral salt spray (NSS) tests, the optimized BTC-TiZr CC, prepared in a Ti–Zr solution containing 0.5 g/L BTC, a treatment temperature of 25 °C, and a short immersion duration of 120 s, exhibited superior corrosion resistance, robust adhesion strength, and exceptional FFC inhibition. Metal–organic complexes (MOCs) of Ti/Zr/Zn with BTC were identified alongside mixed Ti/Zr/Zn/Al/Mg oxides and fluorides within the BTC-TiZr CC. BTC not only exerted strong corrosion inhibition efficacy for ZM-steel but also facilitated the formation of MOCs with metal ions in TiZr conversion solutions (CSs). Density functional theory calculations revealed that BTC preferentially adsorbs onto the MgZn<sub>2</sub> phase, effectively suppressing its dissolution within the ZM layer. These findings establish BTC-TiZr CCs as a promising, environmentally friendly solution for advanced corrosion protection of ZM-steel, especially FFC suppression.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 27","pages":"17475–17493"},"PeriodicalIF":3.9000,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Langmuir","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.langmuir.5c00791","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Under-film filiform corrosion (FFC) poses a significant challenge to the durability and reliability of Zn–Al–Mg-coated steel (ZM-steel), necessitating the development of advanced protective strategies. Herein, benzotriazole 5-carboxylic acid (BTC)-modified titanium zirconium (TiZr) conversion coatings (CCs) were developed as a sustainable solution to mitigate FFC, enhance corrosion resistance, and improve the adhesion of epoxy (EP) coatings on ZM-steel. Through electrochemical impedance spectroscopy, potentiodynamic polarization, FFC, and neutral salt spray (NSS) tests, the optimized BTC-TiZr CC, prepared in a Ti–Zr solution containing 0.5 g/L BTC, a treatment temperature of 25 °C, and a short immersion duration of 120 s, exhibited superior corrosion resistance, robust adhesion strength, and exceptional FFC inhibition. Metal–organic complexes (MOCs) of Ti/Zr/Zn with BTC were identified alongside mixed Ti/Zr/Zn/Al/Mg oxides and fluorides within the BTC-TiZr CC. BTC not only exerted strong corrosion inhibition efficacy for ZM-steel but also facilitated the formation of MOCs with metal ions in TiZr conversion solutions (CSs). Density functional theory calculations revealed that BTC preferentially adsorbs onto the MgZn₂ phase, effectively suppressing its dissolution within the ZM layer. These findings establish BTC-TiZr CCs as a promising, environmentally friendly solution for advanced corrosion protection of ZM-steel, especially FFC suppression.

Abstract Image

查看原文本刊更多论文

Ti-Zr转化涂层对zn - al - mg包覆钢丝状缓蚀作用：苯并三唑-5-羧酸的关键作用。

膜下丝状腐蚀（FFC）对锌铝镁涂层钢（zm钢）的耐久性和可靠性提出了重大挑战，需要开发先进的防护策略。本研究开发了苯并三唑5-羧酸（BTC）改性锆钛（TiZr）转化涂层（CCs），作为一种可持续的解决方案，以减轻FFC，提高耐腐蚀性，并改善环氧（EP）涂层在zm钢上的附着力。通过电化学阻抗谱、动电位极化、FFC和中立盐雾（NSS）测试，优化后的BTC- tizr CC在含0.5 g/L BTC的Ti-Zr溶液中，处理温度为25℃，浸泡时间为120 s，具有优异的耐腐蚀性、良好的粘附强度和良好的FFC抑制作用。BTC-TiZr CC中存在Ti/Zr/Zn/Al/Mg混合氧化物和氟化物，BTC不仅对zm钢具有较强的缓蚀作用，而且在TiZr转化溶液（CSs）中促进了金属离子与moc的形成。密度泛函理论计算表明，BTC优先吸附在MgZn2相上，有效抑制其在ZM层内的溶解。这些研究结果表明，BTC-TiZr cc是一种有前途的环保解决方案，可用于zm钢的高级腐蚀保护，特别是FFC抑制。

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

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).