EVALUATION OF CORROSION IN WELD REGION AND BASE METAL OF API 5L X80 PIPE IN MEDIUM CONTAINING HYDROGEN SULPHIDE
The objective of this study is to compare the corrosion resistance of the base metal (MB) and weld region (RCS) of a X80 pipeline in three types of aqueous solution of acetic acid (CH3COOH) 0,5% by weight: naturally aerated, non-aerated and non-aerated with H2S. Linear polarization is employed for...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia, Materiais e Mineração
2012-09-01
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| Series: | Tecnologia em Metalurgia, Materiais e Mineração |
| Subjects: | |
| Online Access: | http://www.tecnologiammm.com.br/files/v9n3/v9n3a07.pdf |
| _version_ | 1811174223682469888 |
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| author | Bruno Nagle Armendro Mario Fernando González Ramírez Hélio Goldenstein Neusa Alonso-Falleiros |
| author_facet | Bruno Nagle Armendro Mario Fernando González Ramírez Hélio Goldenstein Neusa Alonso-Falleiros |
| author_sort | Bruno Nagle Armendro |
| collection | DOAJ |
| description | The objective of this study is to compare the corrosion resistance of the base metal (MB) and weld region (RCS)
of a X80 pipeline in three types of aqueous solution of acetic acid (CH3COOH) 0,5% by weight: naturally aerated, non-aerated and non-aerated with H2S. Linear polarization is employed for it determinates Polarization Resistance (Rp) which allows comparing the corrosion resistance of steel in different conditions. The results show that Rp practically does not change with the immersion time (until 8 hours), for both regions. The two regions have higher Rp in non-aerated aqueous solution, intermediate Rp in non-aerated with H2S and lower Rp in naturally aerated; this is due the effect of oxygen in cathodic reactions and shows that H2S can accelerate slightly the corrosion. The RCS has greater Rp than the MB for any aeration conditions. The presence of alloying elements in RCS justifies this behavior. The morphology of corrosion was examined under an optical microscope (MO) and shows that uniform corrosion is predominant. |
| first_indexed | 2024-04-10T17:59:35Z |
| format | Article |
| id | doaj.art-8c24410e327a419588481268403871a7 |
| institution | Directory Open Access Journal |
| issn | 2176-1515 2176-1523 |
| language | English |
| last_indexed | 2024-04-10T17:59:35Z |
| publishDate | 2012-09-01 |
| publisher | Associação Brasileira de Metalurgia, Materiais e Mineração |
| record_format | Article |
| series | Tecnologia em Metalurgia, Materiais e Mineração |
| spelling | doaj.art-8c24410e327a419588481268403871a72023-02-02T16:24:37ZengAssociação Brasileira de Metalurgia, Materiais e MineraçãoTecnologia em Metalurgia, Materiais e Mineração2176-15152176-15232012-09-0193220228http://dx.doi.org/10.4322/tmm.2012.031EVALUATION OF CORROSION IN WELD REGION AND BASE METAL OF API 5L X80 PIPE IN MEDIUM CONTAINING HYDROGEN SULPHIDEBruno Nagle Armendro0Mario Fernando González Ramírez1Hélio Goldenstein2Neusa Alonso-Falleiros3Discente de Engenharia Metalúrgica da Escola Politécnica da Universidade de São Paulo – USP,Engenheiro Mecânico, Mestre em Engenharia Metalúrgica, Departamento de Engenharia Metalúrgica e de Materiais, Escola Politécnica da Universidade de São Paulo – USPEngenheiro Metalurgista, Professor Titular do Departamento de Engenharia Metalúrgica e de Materiais da Escola Politécnica, Universidade de São Paulo – USPEngenheira Metalurgista, Professora Doutora do Departamento de Engenharia Metalúrgica e de Materiais da Escola Politécnica, Universidade de São Paulo – USPThe objective of this study is to compare the corrosion resistance of the base metal (MB) and weld region (RCS) of a X80 pipeline in three types of aqueous solution of acetic acid (CH3COOH) 0,5% by weight: naturally aerated, non-aerated and non-aerated with H2S. Linear polarization is employed for it determinates Polarization Resistance (Rp) which allows comparing the corrosion resistance of steel in different conditions. The results show that Rp practically does not change with the immersion time (until 8 hours), for both regions. The two regions have higher Rp in non-aerated aqueous solution, intermediate Rp in non-aerated with H2S and lower Rp in naturally aerated; this is due the effect of oxygen in cathodic reactions and shows that H2S can accelerate slightly the corrosion. The RCS has greater Rp than the MB for any aeration conditions. The presence of alloying elements in RCS justifies this behavior. The morphology of corrosion was examined under an optical microscope (MO) and shows that uniform corrosion is predominant.http://www.tecnologiammm.com.br/files/v9n3/v9n3a07.pdfHydrogen sulphide; API pipe; Corrosion; Weld. |
| spellingShingle | Bruno Nagle Armendro Mario Fernando González Ramírez Hélio Goldenstein Neusa Alonso-Falleiros EVALUATION OF CORROSION IN WELD REGION AND BASE METAL OF API 5L X80 PIPE IN MEDIUM CONTAINING HYDROGEN SULPHIDE Tecnologia em Metalurgia, Materiais e Mineração Hydrogen sulphide; API pipe; Corrosion; Weld. |
| title | EVALUATION OF CORROSION IN WELD REGION AND BASE METAL OF API 5L X80 PIPE IN MEDIUM CONTAINING HYDROGEN SULPHIDE |
| title_full | EVALUATION OF CORROSION IN WELD REGION AND BASE METAL OF API 5L X80 PIPE IN MEDIUM CONTAINING HYDROGEN SULPHIDE |
| title_fullStr | EVALUATION OF CORROSION IN WELD REGION AND BASE METAL OF API 5L X80 PIPE IN MEDIUM CONTAINING HYDROGEN SULPHIDE |
| title_full_unstemmed | EVALUATION OF CORROSION IN WELD REGION AND BASE METAL OF API 5L X80 PIPE IN MEDIUM CONTAINING HYDROGEN SULPHIDE |
| title_short | EVALUATION OF CORROSION IN WELD REGION AND BASE METAL OF API 5L X80 PIPE IN MEDIUM CONTAINING HYDROGEN SULPHIDE |
| title_sort | evaluation of corrosion in weld region and base metal of api 5l x80 pipe in medium containing hydrogen sulphide |
| topic | Hydrogen sulphide; API pipe; Corrosion; Weld. |
| url | http://www.tecnologiammm.com.br/files/v9n3/v9n3a07.pdf |
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