{"title":"氮氧化物气体对热硝酸溶液中不锈钢腐蚀的影响","authors":"M. Takeuchi, G. Whillock","doi":"10.1179/000705902225004338","DOIUrl":null,"url":null,"abstract":"Abstract The effect of NOx purging on the corrosion behaviour of stainless steel in hot 8M nitric acid has been investigated. Gravimetric corrosion rate measurements and electrochemical potential and polarisation data made on nitric acid grade (NAG) 18/10L stainless steel are related to the concentration of nitrous acid produced by NOx purging, which in turn is related to the solution redox potential measured using clean Pt. Purging with NOx is shown to reduce the redox potential of nitric acid solution, but in the absence of other dissolved species acts as an oxidising agent to stainless steel and increases the corrosion rate. T he effect of NOx purging saturates at relatively low flow rate owing to the fact that the solution becomes saturated with nitrous acid. However, in 8M nitric acid containing 3 g L-1 Fe and 0·7 g L-1 Ru at 100°C, NOx purging has no effect on the corrosion rate of NAG 18/10L. This is considered to indicate that Fe and Ru at these concentrations polarise stainless steel to the same corrosion potential as NOx is capable of achieving.","PeriodicalId":9349,"journal":{"name":"British Corrosion Journal","volume":"19 1","pages":"199 - 205"},"PeriodicalIF":0.0000,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"15","resultStr":"{\"title\":\"Effect of NOx gases on corrosion of stainless stell in hot nitric acid solutions\",\"authors\":\"M. Takeuchi, G. Whillock\",\"doi\":\"10.1179/000705902225004338\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract The effect of NOx purging on the corrosion behaviour of stainless steel in hot 8M nitric acid has been investigated. Gravimetric corrosion rate measurements and electrochemical potential and polarisation data made on nitric acid grade (NAG) 18/10L stainless steel are related to the concentration of nitrous acid produced by NOx purging, which in turn is related to the solution redox potential measured using clean Pt. Purging with NOx is shown to reduce the redox potential of nitric acid solution, but in the absence of other dissolved species acts as an oxidising agent to stainless steel and increases the corrosion rate. T he effect of NOx purging saturates at relatively low flow rate owing to the fact that the solution becomes saturated with nitrous acid. However, in 8M nitric acid containing 3 g L-1 Fe and 0·7 g L-1 Ru at 100°C, NOx purging has no effect on the corrosion rate of NAG 18/10L. This is considered to indicate that Fe and Ru at these concentrations polarise stainless steel to the same corrosion potential as NOx is capable of achieving.\",\"PeriodicalId\":9349,\"journal\":{\"name\":\"British Corrosion Journal\",\"volume\":\"19 1\",\"pages\":\"199 - 205\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"15\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"British Corrosion Journal\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1179/000705902225004338\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"British Corrosion Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1179/000705902225004338","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 15
摘要
摘要研究了NOx吹扫对不锈钢在高温8M硝酸中腐蚀行为的影响。在硝酸级(NAG) 18/10L不锈钢上进行的重力腐蚀速率测量、电化学电位和极化数据与NOx净化产生的硝酸浓度有关，而硝酸浓度又与使用清洁Pt测量的溶液氧化还原电位有关。用NOx净化可以降低硝酸溶液的氧化还原电位。但在没有其他溶解物质的情况下，对不锈钢起氧化作用，增加腐蚀速度。在较低的流速下，由于溶液被亚硝酸饱和，NOx的净化效果达到饱和。而在100℃下，在含有3 g L-1 Fe和0.7 g L-1 Ru的8M硝酸中，NOx吹扫对NAG 18/10L的腐蚀速率没有影响。这被认为表明铁和钌在这些浓度下使不锈钢极化到与NOx能够达到的腐蚀电位相同。
Effect of NOx gases on corrosion of stainless stell in hot nitric acid solutions
Abstract The effect of NOx purging on the corrosion behaviour of stainless steel in hot 8M nitric acid has been investigated. Gravimetric corrosion rate measurements and electrochemical potential and polarisation data made on nitric acid grade (NAG) 18/10L stainless steel are related to the concentration of nitrous acid produced by NOx purging, which in turn is related to the solution redox potential measured using clean Pt. Purging with NOx is shown to reduce the redox potential of nitric acid solution, but in the absence of other dissolved species acts as an oxidising agent to stainless steel and increases the corrosion rate. T he effect of NOx purging saturates at relatively low flow rate owing to the fact that the solution becomes saturated with nitrous acid. However, in 8M nitric acid containing 3 g L-1 Fe and 0·7 g L-1 Ru at 100°C, NOx purging has no effect on the corrosion rate of NAG 18/10L. This is considered to indicate that Fe and Ru at these concentrations polarise stainless steel to the same corrosion potential as NOx is capable of achieving.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
