{"title":"Experimental approach and assessment of Zr conversion coatings on Al alloy using response surface methodology","authors":"Ana Kraš , Davorin Kramar , Ingrid Milošev","doi":"10.1016/j.corsci.2025.112824","DOIUrl":null,"url":null,"abstract":"<div><div>This study extended the use of response surface methodology (RSM) to explore the experimental space, identify optimal conditions for deposition and drying, and assess factor interactions for zirconium conversion coatings on aluminium alloy 5754. Corrosion resistance in a dilute Harrison's solution was evaluated using a non-electrochemical drop test and electrochemical techniques. Surface analysis supported the electrochemical findings obtained with the chosen RSM conditions. Unlike zinc and cold-rolled steel, AA5754 exhibits heightened sensitivity to the interplay of pH, conversion time, and H<sub>2</sub>ZrF<sub>6</sub> concentration, which is attributed to the presence of intermetallic particles governing cathodic reactions and the subsequent conversion processes.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112824"},"PeriodicalIF":7.4000,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Corrosion Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0010938X25001519","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This study extended the use of response surface methodology (RSM) to explore the experimental space, identify optimal conditions for deposition and drying, and assess factor interactions for zirconium conversion coatings on aluminium alloy 5754. Corrosion resistance in a dilute Harrison's solution was evaluated using a non-electrochemical drop test and electrochemical techniques. Surface analysis supported the electrochemical findings obtained with the chosen RSM conditions. Unlike zinc and cold-rolled steel, AA5754 exhibits heightened sensitivity to the interplay of pH, conversion time, and H2ZrF6 concentration, which is attributed to the presence of intermetallic particles governing cathodic reactions and the subsequent conversion processes.
期刊介绍：
Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies.
This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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