Humidity-induced curing and anti-corrosion properties of GPTMS-modified polyorganosilazane functionalized silica coating on AA2024-T3 aluminum alloy

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Sol-Gel Science and Technology Pub Date : 2024-08-17 DOI:10.1007/s10971-024-06473-y

Udhaya Kumar Aruchamy, Emilia Merino, Alicia Durán, Helena Pálková, Dušan Galusek, Yolanda Castro

{"title":"Humidity-induced curing and anti-corrosion properties of GPTMS-modified polyorganosilazane functionalized silica coating on AA2024-T3 aluminum alloy","authors":"Udhaya Kumar Aruchamy, Emilia Merino, Alicia Durán, Helena Pálková, Dušan Galusek, Yolanda Castro","doi":"10.1007/s10971-024-06473-y","DOIUrl":null,"url":null,"abstract":"<div><p>Relative humidity (RH) is one of the key parameters that significantly affect the curing kinetics and final properties of polysilazane-based coatings. Thus, the paper discusses the effect of relative humidity during the curing process and the anti-corrosion properties of (3-glycidyloxypropyl) trimethoxysilane (GPTMS)-modified polyorganosilazane (OPSZ) functionalized silica coatings on AA2024-T3. Modified polyorganosilazane sol was prepared and then deposited on AA2024-T3 substrates varying the curing conditions. After the deposition, the coated aluminum substrates were exposed to different RH levels; 15%, 40% and 80%, and then cured at 120 °C for 2 h. Transparent and crack-free GPTMS-modified polyorganosilazane coatings with a thickness of around 15–17 μm were obtained. The exposure to the relative humidity increased the crosslinking and hydrolysis-condensation reactions of the OPSZ and GPTMS molecules, showing more Si-O-Si bonds. The incorporation of GPTMS affected the crosslinking structure, enhancing the corrosion protection properties of the coating. GPTMS-modified polyorganosilazane coatings cured at 40%RH had the best anti-corrosive properties after immersion in 3.5 wt% NaCl solution. The impedance modulus of ∼10<sup>9</sup> Ω.cm<sup>2</sup> at a low frequency was obtained, which was five orders of magnitude higher than that for the AA2024-T3 alloy.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 1","pages":"140 - 151"},"PeriodicalIF":2.3000,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-024-06473-y.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-024-06473-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Relative humidity (RH) is one of the key parameters that significantly affect the curing kinetics and final properties of polysilazane-based coatings. Thus, the paper discusses the effect of relative humidity during the curing process and the anti-corrosion properties of (3-glycidyloxypropyl) trimethoxysilane (GPTMS)-modified polyorganosilazane (OPSZ) functionalized silica coatings on AA2024-T3. Modified polyorganosilazane sol was prepared and then deposited on AA2024-T3 substrates varying the curing conditions. After the deposition, the coated aluminum substrates were exposed to different RH levels; 15%, 40% and 80%, and then cured at 120 °C for 2 h. Transparent and crack-free GPTMS-modified polyorganosilazane coatings with a thickness of around 15–17 μm were obtained. The exposure to the relative humidity increased the crosslinking and hydrolysis-condensation reactions of the OPSZ and GPTMS molecules, showing more Si-O-Si bonds. The incorporation of GPTMS affected the crosslinking structure, enhancing the corrosion protection properties of the coating. GPTMS-modified polyorganosilazane coatings cured at 40%RH had the best anti-corrosive properties after immersion in 3.5 wt% NaCl solution. The impedance modulus of ∼10⁹ Ω.cm² at a low frequency was obtained, which was five orders of magnitude higher than that for the AA2024-T3 alloy.

Graphical Abstract

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

AA2024-T3 铝合金上的 GPTMS 改性聚有机硅氮烷功能化二氧化硅涂层的湿度诱导固化和抗腐蚀性能

相对湿度（RH）是对聚硅氧烷涂料的固化动力学和最终性能产生重大影响的关键参数之一。因此，本文讨论了固化过程中相对湿度的影响以及 AA2024-T3 上 (3-glycidyloxypropyl) trimethoxysilane (GPTMS) 改性聚有机硅氮烷 (OPSZ) 功能化二氧化硅涂层的防腐蚀性能。制备改性聚有机硅氮烷溶胶后，通过改变固化条件沉积在 AA2024-T3 基材上。沉积完成后，将涂覆的铝基板暴露在不同的相对湿度水平（15%、40% 和 80%）下，然后在 120 °C 下固化 2 小时，得到了透明无裂纹的 GPTMS 改性聚有机硅氮烷涂层，厚度约为 15-17 μm。暴露在相对湿度下增加了 OPSZ 和 GPTMS 分子的交联和水解缩合反应，显示出更多的 Si-O-Si 键。GPTMS 的加入影响了交联结构，增强了涂层的防腐蚀性能。在 40%RH 下固化的 GPTMS 改性聚有机硅氮烷涂层在 3.5 wt% 的 NaCl 溶液中浸泡后具有最佳的防腐蚀性能。低频下的阻抗模量为 ∼109 Ω.cm2 ，比 AA2024-T3 合金的阻抗模量高五个数量级。

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分钟内获得全文去求助

来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.