{"title":"High-temperature corrosion resistance of weld overlay In625 coating in aggressive environments of waste incinerators","authors":"Haiyan Li, Huan Liu, Jianquan Li, Hong Yao","doi":"10.1016/j.corsci.2025.112865","DOIUrl":null,"url":null,"abstract":"<div><div>Corrosion resistance and mechanism of Inconel625 at 500–700 °C in high-parameter waste incinerators were investigated. In the deposit-corrosion condition, Cr/Mo in the coating would be dissolved, producing soluble products such as Na<sub>2</sub>CrO<sub>4</sub>/Na<sub>2</sub>MoO<sub>4</sub>. At 600/700°C, the risk of Cr loss in the form of CrO<sub>4</sub><sup>2-</sup> was increased from ∼30 % to ∼70 %. While in coupling corrosion environment (with HCl/SO<sub>2</sub>), chlorides of Ni/Fe were dominant in the soluble corrosion products due to the high partial pressure of Cl<sub>2</sub>. Though the corrosion rate was significantly accelerated during coupling corrosion, Inconel625 could form protective bilayer oxides and maintain its corrosion resistance in both conditions.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112865"},"PeriodicalIF":7.4000,"publicationDate":"2025-03-13","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/S0010938X25001921","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}
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Abstract
Corrosion resistance and mechanism of Inconel625 at 500–700 °C in high-parameter waste incinerators were investigated. In the deposit-corrosion condition, Cr/Mo in the coating would be dissolved, producing soluble products such as Na2CrO4/Na2MoO4. At 600/700°C, the risk of Cr loss in the form of CrO42- was increased from ∼30 % to ∼70 %. While in coupling corrosion environment (with HCl/SO2), chlorides of Ni/Fe were dominant in the soluble corrosion products due to the high partial pressure of Cl2. Though the corrosion rate was significantly accelerated during coupling corrosion, Inconel625 could form protective bilayer oxides and maintain its corrosion resistance in both conditions.
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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