Pub Date : 2021-12-07DOI: 10.15765/poli.v1i001.2741
Ana María Morales-Polanco
{"title":"Nany en Cuarentena","authors":"Ana María Morales-Polanco","doi":"10.15765/poli.v1i001.2741","DOIUrl":"https://doi.org/10.15765/poli.v1i001.2741","url":null,"abstract":"","PeriodicalId":280138,"journal":{"name":"Catálogo editorial","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128124478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-07DOI: 10.15765/poli.v1i001.2752
Jennifer Stefania Caldas-Ortega
As reported before, conventional group of flat heald, heald C, has used to serve for about two years, while a new group of flat heald, heald X, suffered significant localized corrosion earlier in one or two months. In this study, steel C’ of chemical composition similar to heald C is heat-treated to reproduce the heald C in terms of metallurgical characteristics ( hardness H v ; amount of insoluble carbide ［ MC ］ ; prior austenite grain size d γ ) . The characteristics of heald C ( 484 Hv ; 1.2 ％ ; 12 μ m ) is found to be reproduced by a solution-treatment at 1040 ℃ for 180 s, WQ followed by tempering at 450 ℃ for 20 s, AC. Those of heald X ( 474 Hv ; 2.0 ％ ; 12 μ m ) , lower in hardness and more in insoluble carbide than C, could be reproduced by solution-treatment at 1040 ℃ for around 100 s, shorter time than heald C. The heat treatment condition determined as above is confirmed to corrode the steel C’ in 6.8 vol ％ HNO 3 solution similarly in surface appearance to healds C and X. Their corrosion rates in the same solution vs. soluble Cr content, ［ Cr ］ relationship are nearly equal to the corrosion rates vs. ［ Cr ］ relationship for relevant solution-treated steels. The repassivation potential for crevice corrosion, E R.CREV , in 0.85, 2.8 or 28 mM NaCl solution depends also on ［ Cr ］ , nearly constant between ［ Cr ］ range of 11.5 and 12.8 ％ , and above which becomes more noble with increasing ［ Cr ］ up to 13.4 ％ . Then, ［ Cr ］ values of 11.5 ％ ( heald X ) and 12.5 ％ ( heald C ) make no difference in E R.CREV . Real crevice corrosion for heald X was attributed to more noble spontaneous electrode potential, E SP , of heald X than E R.CREV under increased residual chlorine, as reported before.
{"title":"Corrosión","authors":"Jennifer Stefania Caldas-Ortega","doi":"10.15765/poli.v1i001.2752","DOIUrl":"https://doi.org/10.15765/poli.v1i001.2752","url":null,"abstract":"As reported before, conventional group of flat heald, heald C, has used to serve for about two years, while a new group of flat heald, heald X, suffered significant localized corrosion earlier in one or two months. In this study, steel C’ of chemical composition similar to heald C is heat-treated to reproduce the heald C in terms of metallurgical characteristics ( hardness H v ; amount of insoluble carbide ［ MC ］ ; prior austenite grain size d γ ) . The characteristics of heald C ( 484 Hv ; 1.2 ％ ; 12 μ m ) is found to be reproduced by a solution-treatment at 1040 ℃ for 180 s, WQ followed by tempering at 450 ℃ for 20 s, AC. Those of heald X ( 474 Hv ; 2.0 ％ ; 12 μ m ) , lower in hardness and more in insoluble carbide than C, could be reproduced by solution-treatment at 1040 ℃ for around 100 s, shorter time than heald C. The heat treatment condition determined as above is confirmed to corrode the steel C’ in 6.8 vol ％ HNO 3 solution similarly in surface appearance to healds C and X. Their corrosion rates in the same solution vs. soluble Cr content, ［ Cr ］ relationship are nearly equal to the corrosion rates vs. ［ Cr ］ relationship for relevant solution-treated steels. The repassivation potential for crevice corrosion, E R.CREV , in 0.85, 2.8 or 28 mM NaCl solution depends also on ［ Cr ］ , nearly constant between ［ Cr ］ range of 11.5 and 12.8 ％ , and above which becomes more noble with increasing ［ Cr ］ up to 13.4 ％ . Then, ［ Cr ］ values of 11.5 ％ ( heald X ) and 12.5 ％ ( heald C ) make no difference in E R.CREV . Real crevice corrosion for heald X was attributed to more noble spontaneous electrode potential, E SP , of heald X than E R.CREV under increased residual chlorine, as reported before.","PeriodicalId":280138,"journal":{"name":"Catálogo editorial","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126016538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-07DOI: 10.15765/poli.v1i001.2756
Juan Pablo Salamanca-Cortés
{"title":"La Necesidad del Olvido","authors":"Juan Pablo Salamanca-Cortés","doi":"10.15765/poli.v1i001.2756","DOIUrl":"https://doi.org/10.15765/poli.v1i001.2756","url":null,"abstract":"","PeriodicalId":280138,"journal":{"name":"Catálogo editorial","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122765151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-07DOI: 10.15765/poli.v1i001.2749
David Steven Pérez-Murcia
{"title":"La Celda de Oro","authors":"David Steven Pérez-Murcia","doi":"10.15765/poli.v1i001.2749","DOIUrl":"https://doi.org/10.15765/poli.v1i001.2749","url":null,"abstract":"","PeriodicalId":280138,"journal":{"name":"Catálogo editorial","volume":"34 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123148324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-07DOI: 10.15765/poli.v1i001.2750
Dilan Fabián Piñeros-Díaz
{"title":"El Pasar del Tiempo","authors":"Dilan Fabián Piñeros-Díaz","doi":"10.15765/poli.v1i001.2750","DOIUrl":"https://doi.org/10.15765/poli.v1i001.2750","url":null,"abstract":"","PeriodicalId":280138,"journal":{"name":"Catálogo editorial","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114404675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：