{"title":"Effect of graphene on corrosion resistance of low zinc epoxy coatings applied to low-carbon steel","authors":"","doi":"10.5006/4435","DOIUrl":null,"url":null,"abstract":"\n To reduce the consumption of zinc resources, it is necessary to reduce the zinc powder content of epoxy zinc-rich coatings. However, the reduced zinc powder content tends to reduce the degree of connectivity in the layer, which leads to a reduction in the corrosion resistance of the coating. The effective zinc powder content was also reduced. Therefore, it is important to increase the connection capacity of the zinc powder in the coating while reducing the amount of zinc powder. In this paper, an epoxy coating with low zinc content is prepared by using flake zinc powder instead of spherical zinc powder. It also uses graphene to connect zinc powder in the coating to increase the electrical conductivity of the zinc powder in the coating. This results in an increase in the protection of the coating determined, although the cathodic protection of the coating was not prolonged by the results of OCP and EIS. In addition, when the zinc powder in the coating is cleanly consumed, the complex nature of corrosion product formed with graphene can increase the barrier resistance of the coating thereby increasing the corrosion resistance.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":"41 8","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Corrosion","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.5006/4435","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
To reduce the consumption of zinc resources, it is necessary to reduce the zinc powder content of epoxy zinc-rich coatings. However, the reduced zinc powder content tends to reduce the degree of connectivity in the layer, which leads to a reduction in the corrosion resistance of the coating. The effective zinc powder content was also reduced. Therefore, it is important to increase the connection capacity of the zinc powder in the coating while reducing the amount of zinc powder. In this paper, an epoxy coating with low zinc content is prepared by using flake zinc powder instead of spherical zinc powder. It also uses graphene to connect zinc powder in the coating to increase the electrical conductivity of the zinc powder in the coating. This results in an increase in the protection of the coating determined, although the cathodic protection of the coating was not prolonged by the results of OCP and EIS. In addition, when the zinc powder in the coating is cleanly consumed, the complex nature of corrosion product formed with graphene can increase the barrier resistance of the coating thereby increasing the corrosion resistance.
为了减少锌资源的消耗，有必要降低环氧富锌涂层的锌粉含量。然而，锌粉含量的减少往往会降低涂层的连通度，从而导致涂层的耐腐蚀性降低。有效锌粉含量也随之降低。因此，在减少锌粉用量的同时，提高涂层中锌粉的连接能力非常重要。本文采用片状锌粉代替球状锌粉，制备了一种锌含量较低的环氧涂层。它还使用石墨烯连接涂层中的锌粉，以增加涂层中锌粉的导电性。虽然从 OCP 和 EIS 的结果来看，涂层的阴极保护时间并没有延长，但这还是提高了涂层的保护能力。此外，当涂层中的锌粉被消耗干净后，与石墨烯形成的腐蚀产物的复杂性质可以增加涂层的阻挡性，从而提高耐腐蚀性。
期刊介绍：
CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion.
70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities.
Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives:
• Contribute awareness of corrosion phenomena,
• Advance understanding of fundamental process, and/or
• Further the knowledge of techniques and practices used to reduce corrosion.
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