Evaluation of duplex stainless steels for the construction of a digestor
The possibility of the construction of a digester for a Kraft pulping plant with the evaluation of the performance in relation to stainless steels corrosion was studied. The stainless steels used as working electrodes were: LDX 2101, 2205 and SAF 2304, in the three zones, sine of the alloy, weld met...
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| Format: | Online |
| Language: | Spanish |
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Facultad de Ciencias Exactas, Químicas y Naturales
2011
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| Subjects: | |
| Online Access: | https://www.fceqyn.unam.edu.ar/recyt/index.php/recyt/article/view/486 |
| _version_ | 1824325841936449536 |
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| author | Méndez, Claudia M. Ruiz, Elsa R. |
| author_facet | Méndez, Claudia M. Ruiz, Elsa R. |
| author_sort | Méndez, Claudia M. |
| collection | Revista de Ciencia y Tecnologia RECyT |
| description | The possibility of the construction of a digester for a Kraft pulping plant with the evaluation of the performance in relation to stainless steels corrosion was studied. The stainless steels used as working electrodes were: LDX 2101, 2205 and SAF 2304, in the three zones, sine of the alloy, weld metal and heat- affected zone (HAZ). ASTM Standards were applied. The results obtained were provided by the Electrochemical Impedance Spectroscopy technique, together with optical observations. The measurements were carried out in the media specified by the standards and in white liquor, 90 g/l NaOH, 40 g/l Na2S y 20 g/l Na2CO3, pH 14 solution, at T= 90-100 ºC. Alloys suffered attack of the crevice and pit type, or only pit according to the aggressiveness of the medium. The susceptibility of the intergranular attack was different in relation to the alloy and also to the area under study. The duplex stainless steel 2205 appears to be less susceptible to localized corrosion. |
| format | Online |
| id | ojs-article-486 |
| institution | Facultad de Ciencias Exactas Quimicas y Naturales |
| language | Spanish |
| publishDate | 2011 |
| publisher | Facultad de Ciencias Exactas, Químicas y Naturales |
| record_format | ojs |
| spelling | ojs-article-4862020-03-06T10:53:38Z Evaluation of duplex stainless steels for the construction of a digestor Evaluación de aceros inoxidables duplex para la construcción de un digestor Méndez, Claudia M. Ruiz, Elsa R. digester duplex stainless steel corrosion white liquor digestor aceros inoxidables dúplex corrosión licor blanco The possibility of the construction of a digester for a Kraft pulping plant with the evaluation of the performance in relation to stainless steels corrosion was studied. The stainless steels used as working electrodes were: LDX 2101, 2205 and SAF 2304, in the three zones, sine of the alloy, weld metal and heat- affected zone (HAZ). ASTM Standards were applied. The results obtained were provided by the Electrochemical Impedance Spectroscopy technique, together with optical observations. The measurements were carried out in the media specified by the standards and in white liquor, 90 g/l NaOH, 40 g/l Na2S y 20 g/l Na2CO3, pH 14 solution, at T= 90-100 ºC. Alloys suffered attack of the crevice and pit type, or only pit according to the aggressiveness of the medium. The susceptibility of the intergranular attack was different in relation to the alloy and also to the area under study. The duplex stainless steel 2205 appears to be less susceptible to localized corrosion. Se estudia la posibilidad de fabricación de un digestor para una planta de pulpado Kraft, evaluando el comportamiento respecto a la corrosión de aceros inoxidables. Los aceros inoxidables dúplex empleados como electrodos de trabajo fueron: LDX 2101, 2205 y SAF 2304, y se los estudió en tres zonas, seno de la aleación, cordón de soldadura y zona afectada por el calor (zac), aplicando Normas ASTM. Se obtuvieron también resultados proporcionados por la técnica de Espectroscopia de Impedancia Electroquímica, además de observaciones ópticas. Las medidas se realizaron en los medios especificados por las normas y en licor blanco, solución de 90 g/l NaOH, 40 g/l Na2S y 20 g/l Na2CO3, pH 14, a T= 90-100 ºC. Las aleaciones sufrieron ataque tipo rendija y picadura, o solamente picadura según la agresividad del medio. La susceptibilidad al ataque intergranular fue diferente según la aleación y la zona sometida a estudio. Se concluye que el acero inoxidable duplex 2205 es el menos susceptible a la corrosión localizada. Facultad de Ciencias Exactas, Químicas y Naturales 2011-12-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.fceqyn.unam.edu.ar/recyt/index.php/recyt/article/view/486 Argentine Journal of Science and Technology; Vol. 16 No. 1 (2011); 44-48 Revista de Ciencia y Tecnología; Vol. 16 Núm. 1 (2011); 44-48 1851-7587 0329-8922 spa https://www.fceqyn.unam.edu.ar/recyt/index.php/recyt/article/view/486/407 Derechos de autor 2011 Revista de Ciencia y Tecnología |
| spellingShingle | digester duplex stainless steel corrosion white liquor digestor aceros inoxidables dúplex corrosión licor blanco Méndez, Claudia M. Ruiz, Elsa R. Evaluation of duplex stainless steels for the construction of a digestor |
| title | Evaluation of duplex stainless steels for the construction of a digestor |
| title_alt | Evaluación de aceros inoxidables duplex para la construcción de un digestor |
| title_full | Evaluation of duplex stainless steels for the construction of a digestor |
| title_fullStr | Evaluation of duplex stainless steels for the construction of a digestor |
| title_full_unstemmed | Evaluation of duplex stainless steels for the construction of a digestor |
| title_short | Evaluation of duplex stainless steels for the construction of a digestor |
| title_sort | evaluation of duplex stainless steels for the construction of a digestor |
| topic | digester duplex stainless steel corrosion white liquor digestor aceros inoxidables dúplex corrosión licor blanco |
| topic_facet | digester duplex stainless steel corrosion white liquor digestor aceros inoxidables dúplex corrosión licor blanco |
| url | https://www.fceqyn.unam.edu.ar/recyt/index.php/recyt/article/view/486 |
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EVALUATION OF LOCALIZED CORROSION ATTACK ON HIGH CHROMIUM STAINLESS STEELS IN CHLORINATED OXIDANT MEDIA