Xiaoying Zhang , Xiaoyuan Li , Xiaoqing Wang , Zuquan Jin
{"title":"在海洋环境中使用 In2O3/C3N4/CNT 纳米复合材料对 304 不锈钢进行高效的光电阴极保护涂层双重保护","authors":"Xiaoying Zhang , Xiaoyuan Li , Xiaoqing Wang , Zuquan Jin","doi":"10.1016/j.conbuildmat.2024.139096","DOIUrl":null,"url":null,"abstract":"<div><div>A photoelectrochemical cathodic protection coating with EP/In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub>/CNT composite was designed and its anti-corrosion mechanism was further investigated. It was found that the introduction of In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub> not only densified the microporous structure but also enhanced the hydrophobicity, tensile strength and UV aging resistance of epoxy resin (EP) coatings, improving the physical shielding effects of the coating. In addition, the photogenerated electrons produced by In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub> nanocomposites could transfer to surface of 304 SS through the electronic transmission network of CNT under illumination. Owing to its dual protection, the corrosion current (I<sub>corr</sub>) of 304 SS/EP/In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub>/CNT reduced by 95.8 % and 67.8 % of that of 304SS and 304 SS/EP in dark, respectively. Under illumination, the OCP values of EP/In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub> and EP/In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub>/CNT composite coatings were rapidly shifted negatively to −170 mV and −274 mV, respectively, which were both lower than the self-corrosion potential of 304 SS. Therefore, the introduction of optoelectronic nanoparticles into coatings is believed to be an effective strategy for providing dual protection for metals, which not only improved the physical shielding effects of the coating but also enhanced the photocathodic protection performance at the dark state.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 139096"},"PeriodicalIF":7.4000,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High-efficiency dual protection of photoelectrochemical cathodic protection coating with In2O3/C3N4/CNT nanocomposites for 304 stainless steel in marine environment\",\"authors\":\"Xiaoying Zhang , Xiaoyuan Li , Xiaoqing Wang , Zuquan Jin\",\"doi\":\"10.1016/j.conbuildmat.2024.139096\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A photoelectrochemical cathodic protection coating with EP/In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub>/CNT composite was designed and its anti-corrosion mechanism was further investigated. It was found that the introduction of In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub> not only densified the microporous structure but also enhanced the hydrophobicity, tensile strength and UV aging resistance of epoxy resin (EP) coatings, improving the physical shielding effects of the coating. In addition, the photogenerated electrons produced by In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub> nanocomposites could transfer to surface of 304 SS through the electronic transmission network of CNT under illumination. Owing to its dual protection, the corrosion current (I<sub>corr</sub>) of 304 SS/EP/In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub>/CNT reduced by 95.8 % and 67.8 % of that of 304SS and 304 SS/EP in dark, respectively. Under illumination, the OCP values of EP/In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub> and EP/In<sub>2</sub>O<sub>3</sub>/C<sub>3</sub>N<sub>4</sub>/CNT composite coatings were rapidly shifted negatively to −170 mV and −274 mV, respectively, which were both lower than the self-corrosion potential of 304 SS. Therefore, the introduction of optoelectronic nanoparticles into coatings is believed to be an effective strategy for providing dual protection for metals, which not only improved the physical shielding effects of the coating but also enhanced the photocathodic protection performance at the dark state.</div></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":\"453 \",\"pages\":\"Article 139096\"},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2024-11-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Construction and Building Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0950061824042387\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061824042387","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
High-efficiency dual protection of photoelectrochemical cathodic protection coating with In2O3/C3N4/CNT nanocomposites for 304 stainless steel in marine environment
A photoelectrochemical cathodic protection coating with EP/In2O3/C3N4/CNT composite was designed and its anti-corrosion mechanism was further investigated. It was found that the introduction of In2O3/C3N4 not only densified the microporous structure but also enhanced the hydrophobicity, tensile strength and UV aging resistance of epoxy resin (EP) coatings, improving the physical shielding effects of the coating. In addition, the photogenerated electrons produced by In2O3/C3N4 nanocomposites could transfer to surface of 304 SS through the electronic transmission network of CNT under illumination. Owing to its dual protection, the corrosion current (Icorr) of 304 SS/EP/In2O3/C3N4/CNT reduced by 95.8 % and 67.8 % of that of 304SS and 304 SS/EP in dark, respectively. Under illumination, the OCP values of EP/In2O3/C3N4 and EP/In2O3/C3N4/CNT composite coatings were rapidly shifted negatively to −170 mV and −274 mV, respectively, which were both lower than the self-corrosion potential of 304 SS. Therefore, the introduction of optoelectronic nanoparticles into coatings is believed to be an effective strategy for providing dual protection for metals, which not only improved the physical shielding effects of the coating but also enhanced the photocathodic protection performance at the dark state.
期刊介绍：
Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged.
Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.
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