{"title":"铬对暴露于硫酸钙的镍铬合金高温腐蚀的影响","authors":"Nicholas Ury, Vilupanur Ravi","doi":"10.1007/s11085-024-10232-3","DOIUrl":null,"url":null,"abstract":"<div><p>Calcium- and sulfur-rich deposits have been linked to failure of turbine components as a consequence of high temperature exposures (> 1000 °C). There are only limited studies on the effects of these deposits on the degradation behavior of turbine alloys. To gain further understanding of this phenomenon, a systematic study was undertaken with model binary nickel–chromium alloys. Three alloys with different chromium contents—low, medium and high—represented by Ni-5Cr, Ni-10Cr and Ni-18Cr, were exposed to CaSO<sub>4</sub>-deposit-induced corrosion in the 900–1100 °C temperature range. At 1000 and 1100 °C, the decomposition of CaSO<sub>4</sub> (either by decomposition to CaO and SO<sub>3</sub> or by reacting with Cr<sub>2</sub>O<sub>3</sub>) led to the formation of calcium chromates and chromium sulfides. At the lower temperature, 900 °C, the limited decomposition of CaSO<sub>4</sub> allowed the formation of a continuous Cr<sub>2</sub>O<sub>3</sub> scale.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"101 3","pages":"603 - 620"},"PeriodicalIF":2.1000,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Effects of Chromium on the High Temperature Corrosion of Ni–Cr Alloys Exposed to Calcium Sulfate\",\"authors\":\"Nicholas Ury, Vilupanur Ravi\",\"doi\":\"10.1007/s11085-024-10232-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Calcium- and sulfur-rich deposits have been linked to failure of turbine components as a consequence of high temperature exposures (> 1000 °C). There are only limited studies on the effects of these deposits on the degradation behavior of turbine alloys. To gain further understanding of this phenomenon, a systematic study was undertaken with model binary nickel–chromium alloys. Three alloys with different chromium contents—low, medium and high—represented by Ni-5Cr, Ni-10Cr and Ni-18Cr, were exposed to CaSO<sub>4</sub>-deposit-induced corrosion in the 900–1100 °C temperature range. At 1000 and 1100 °C, the decomposition of CaSO<sub>4</sub> (either by decomposition to CaO and SO<sub>3</sub> or by reacting with Cr<sub>2</sub>O<sub>3</sub>) led to the formation of calcium chromates and chromium sulfides. At the lower temperature, 900 °C, the limited decomposition of CaSO<sub>4</sub> allowed the formation of a continuous Cr<sub>2</sub>O<sub>3</sub> scale.</p></div>\",\"PeriodicalId\":724,\"journal\":{\"name\":\"Oxidation of Metals\",\"volume\":\"101 3\",\"pages\":\"603 - 620\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-03-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Oxidation of Metals\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11085-024-10232-3\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Oxidation of Metals","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11085-024-10232-3","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
The Effects of Chromium on the High Temperature Corrosion of Ni–Cr Alloys Exposed to Calcium Sulfate
Calcium- and sulfur-rich deposits have been linked to failure of turbine components as a consequence of high temperature exposures (> 1000 °C). There are only limited studies on the effects of these deposits on the degradation behavior of turbine alloys. To gain further understanding of this phenomenon, a systematic study was undertaken with model binary nickel–chromium alloys. Three alloys with different chromium contents—low, medium and high—represented by Ni-5Cr, Ni-10Cr and Ni-18Cr, were exposed to CaSO4-deposit-induced corrosion in the 900–1100 °C temperature range. At 1000 and 1100 °C, the decomposition of CaSO4 (either by decomposition to CaO and SO3 or by reacting with Cr2O3) led to the formation of calcium chromates and chromium sulfides. At the lower temperature, 900 °C, the limited decomposition of CaSO4 allowed the formation of a continuous Cr2O3 scale.
期刊介绍：
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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