Corrosion Inhibition of Welded of X – 52 Steel Pipelines by Sodium Molybdate in 3.5% NaCl Solution
The demand for improved reliability and prolong the lifetime of piping and pipelines has led to the development of various methods to protect piping and pipelines from corrosion attack, one of which is the use of inhibitors such as molybdate. Molybdate is a corrosion inhibitor that is non-toxic and...
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| Format: | Article |
| Language: | English |
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Egyptian Petroleum Research Institute
2020-06-01
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| Series: | Egyptian Journal of Petroleum |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110062119303654 |
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| author | Hery Tristijanto Mochammad Noer Ilman Priyo Tri Iswanto |
| author_facet | Hery Tristijanto Mochammad Noer Ilman Priyo Tri Iswanto |
| author_sort | Hery Tristijanto |
| collection | DOAJ |
| description | The demand for improved reliability and prolong the lifetime of piping and pipelines has led to the development of various methods to protect piping and pipelines from corrosion attack, one of which is the use of inhibitors such as molybdate. Molybdate is a corrosion inhibitor that is non-toxic and environmentally friendly. The present paper aims to study effect of molybdate on corrosion behaviors of various regions in submerged arc API 5L X-52 steel welded joints including weld metal (WM), heat affected zone (HAZ) and base metal (BM) in a 3.5% NaCl solution. In this study, corrosion characteristics of welded API 5L X-52 steel pipelines were studied using Tafel polarization method by immersing the specimens in 3.5% NaCl solution with different percentages of Na2MoO4 inhibitors, namely 0.1, 0.2, 0.3, and 0.4% combined with SEM microanalysis of corrosion products. Results show that HAZ seems to be the most susceptible region for corrosion attack, and this undesirable effect is associated with bainitic microstructure present in the region. The additions of molybdate have two effects. First, the corrosion rate decreases with increasing inhibitor concentration and secondly; the corrosion potential is shifted to the positive direction in the polarization curve. The molybdate inhibition of corrosion could be related to its ability to form passive film, and it is discussed in the present study. |
| format | Article |
| id | doaj-art-14b5a5d0e93c4d79af24f91e3dfecec8 |
| institution | Kabale University |
| issn | 1110-0621 |
| language | English |
| publishDate | 2020-06-01 |
| publisher | Egyptian Petroleum Research Institute |
| record_format | Article |
| series | Egyptian Journal of Petroleum |
| spelling | doaj-art-14b5a5d0e93c4d79af24f91e3dfecec82025-08-20T03:54:29ZengEgyptian Petroleum Research InstituteEgyptian Journal of Petroleum1110-06212020-06-0129215516210.1016/j.ejpe.2020.02.001Corrosion Inhibition of Welded of X – 52 Steel Pipelines by Sodium Molybdate in 3.5% NaCl SolutionHery Tristijanto0Mochammad Noer Ilman1Priyo Tri Iswanto2Universitas Gadjah Mada, Indonesia; Politeknik Negeri Semarang, IndonesiaUniversitas Gadjah Mada, Indonesia; Corresponding author at: Department of Mechanical and Industrial Engineering, Univiversitas Gadjah Mada, Jalan Grafika No. 2, Yogyakarta 55281, Indonesia.Universitas Gadjah Mada, IndonesiaThe demand for improved reliability and prolong the lifetime of piping and pipelines has led to the development of various methods to protect piping and pipelines from corrosion attack, one of which is the use of inhibitors such as molybdate. Molybdate is a corrosion inhibitor that is non-toxic and environmentally friendly. The present paper aims to study effect of molybdate on corrosion behaviors of various regions in submerged arc API 5L X-52 steel welded joints including weld metal (WM), heat affected zone (HAZ) and base metal (BM) in a 3.5% NaCl solution. In this study, corrosion characteristics of welded API 5L X-52 steel pipelines were studied using Tafel polarization method by immersing the specimens in 3.5% NaCl solution with different percentages of Na2MoO4 inhibitors, namely 0.1, 0.2, 0.3, and 0.4% combined with SEM microanalysis of corrosion products. Results show that HAZ seems to be the most susceptible region for corrosion attack, and this undesirable effect is associated with bainitic microstructure present in the region. The additions of molybdate have two effects. First, the corrosion rate decreases with increasing inhibitor concentration and secondly; the corrosion potential is shifted to the positive direction in the polarization curve. The molybdate inhibition of corrosion could be related to its ability to form passive film, and it is discussed in the present study.http://www.sciencedirect.com/science/article/pii/S1110062119303654 |
| spellingShingle | Hery Tristijanto Mochammad Noer Ilman Priyo Tri Iswanto Corrosion Inhibition of Welded of X – 52 Steel Pipelines by Sodium Molybdate in 3.5% NaCl Solution Egyptian Journal of Petroleum |
| title | Corrosion Inhibition of Welded of X – 52 Steel Pipelines by Sodium Molybdate in 3.5% NaCl Solution |
| title_full | Corrosion Inhibition of Welded of X – 52 Steel Pipelines by Sodium Molybdate in 3.5% NaCl Solution |
| title_fullStr | Corrosion Inhibition of Welded of X – 52 Steel Pipelines by Sodium Molybdate in 3.5% NaCl Solution |
| title_full_unstemmed | Corrosion Inhibition of Welded of X – 52 Steel Pipelines by Sodium Molybdate in 3.5% NaCl Solution |
| title_short | Corrosion Inhibition of Welded of X – 52 Steel Pipelines by Sodium Molybdate in 3.5% NaCl Solution |
| title_sort | corrosion inhibition of welded of x 52 steel pipelines by sodium molybdate in 3 5 nacl solution |
| url | http://www.sciencedirect.com/science/article/pii/S1110062119303654 |
| work_keys_str_mv | AT herytristijanto corrosioninhibitionofweldedofx52steelpipelinesbysodiummolybdatein35naclsolution AT mochammadnoerilman corrosioninhibitionofweldedofx52steelpipelinesbysodiummolybdatein35naclsolution AT priyotriiswanto corrosioninhibitionofweldedofx52steelpipelinesbysodiummolybdatein35naclsolution |