Effect of heat-treatment processes and high temperature variation of acid-chloride media on the corrosion resistance of B265 (Ti–6Al–4V) titanium alloy in acid-chloride solution
Corrosion resistance of untreated (B265TiN), quenched (B265TiQ), and annealed (B265TiA) B265 titanium alloy was studied in 2–10 M H2SO4 + 10% NaCl solution at 30, 70, and 95°C by potentiodynamic polarization, potentiostatic measurement, open circuit potential measurement, and optical microscopy. B26...
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-04-01
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| Series: | Open Engineering |
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| Online Access: | https://doi.org/10.1515/eng-2022-0037 |
| _version_ | 1818025358744616960 |
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| author | Loto Roland Tolulope |
| author_facet | Loto Roland Tolulope |
| author_sort | Loto Roland Tolulope |
| collection | DOAJ |
| description | Corrosion resistance of untreated (B265TiN), quenched (B265TiQ), and annealed (B265TiA) B265 titanium alloy was studied in 2–10 M H2SO4 + 10% NaCl solution at 30, 70, and 95°C by potentiodynamic polarization, potentiostatic measurement, open circuit potential measurement, and optical microscopy. B265TiN was the most resistant of the alloys to general corrosion at 30°C with values between 0.094 and 3.782 mm/year. B265TiQ exhibited the highest corrosion rate values (0.210–23.399 mm/year). Its plots show significant increase in cathodic slope. At 70 and 95°C, B265TiN exhibited the lowest corrosion rate in 2 and 6 M H2SO4 + 10% NaCl solution, while B265TiQ exhibited the corresponding highest values. Optical characterization shows B265TiN, B265TiQ, and B265TiA alloys are highly resistant to corrosion in 2 M H2SO4 + 10% NaCl at 30°C compared to 10 M H2SO4 + 10% NaCl, where marginal deterioration occurred on B265TiN, significant degradation on B265TiQ, and localized degradation on B265TiA. The extent of degradation increased at 70 and 95°C. B265TiN exhibited the highest resistance to metastable pits formation compared to B265TiQ and B265TiA. Potentiostatic values at 70°C shows high temperature exposure of Ti alloy to accelerated corrosion. Metastable pit initiation values at 70°C are significantly greater. Open circuit potential measurement at 30°C shows B265TiN demonstrated least vulnerability to corrosion with stable oxide formation at 2 M and 6 M H2SO4 + 10% NaCl, and B265TiQ was least vulnerable at 10 M H2SO4 + 10% NaCl. At 70°C, B265TiQ was least vulnerable to corrosion with unstable oxide formation at 2 M and 6 M H2SO4 + 10% NaCl compared to B265TiN at 10 M H2SO4 + 10% NaCl. |
| first_indexed | 2024-12-10T04:14:51Z |
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| id | doaj.art-19c12cfb5d9c4ee38832ca6b6fc4dc9d |
| institution | Directory Open Access Journal |
| issn | 2391-5439 |
| language | English |
| last_indexed | 2024-12-10T04:14:51Z |
| publishDate | 2022-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Engineering |
| spelling | doaj.art-19c12cfb5d9c4ee38832ca6b6fc4dc9d2022-12-22T02:02:38ZengDe GruyterOpen Engineering2391-54392022-04-0112133234810.1515/eng-2022-0037Effect of heat-treatment processes and high temperature variation of acid-chloride media on the corrosion resistance of B265 (Ti–6Al–4V) titanium alloy in acid-chloride solutionLoto Roland Tolulope0Department of Mechanical Engineering, Covenant University, Ota, Ogun State, NigeriaCorrosion resistance of untreated (B265TiN), quenched (B265TiQ), and annealed (B265TiA) B265 titanium alloy was studied in 2–10 M H2SO4 + 10% NaCl solution at 30, 70, and 95°C by potentiodynamic polarization, potentiostatic measurement, open circuit potential measurement, and optical microscopy. B265TiN was the most resistant of the alloys to general corrosion at 30°C with values between 0.094 and 3.782 mm/year. B265TiQ exhibited the highest corrosion rate values (0.210–23.399 mm/year). Its plots show significant increase in cathodic slope. At 70 and 95°C, B265TiN exhibited the lowest corrosion rate in 2 and 6 M H2SO4 + 10% NaCl solution, while B265TiQ exhibited the corresponding highest values. Optical characterization shows B265TiN, B265TiQ, and B265TiA alloys are highly resistant to corrosion in 2 M H2SO4 + 10% NaCl at 30°C compared to 10 M H2SO4 + 10% NaCl, where marginal deterioration occurred on B265TiN, significant degradation on B265TiQ, and localized degradation on B265TiA. The extent of degradation increased at 70 and 95°C. B265TiN exhibited the highest resistance to metastable pits formation compared to B265TiQ and B265TiA. Potentiostatic values at 70°C shows high temperature exposure of Ti alloy to accelerated corrosion. Metastable pit initiation values at 70°C are significantly greater. Open circuit potential measurement at 30°C shows B265TiN demonstrated least vulnerability to corrosion with stable oxide formation at 2 M and 6 M H2SO4 + 10% NaCl, and B265TiQ was least vulnerable at 10 M H2SO4 + 10% NaCl. At 70°C, B265TiQ was least vulnerable to corrosion with unstable oxide formation at 2 M and 6 M H2SO4 + 10% NaCl compared to B265TiN at 10 M H2SO4 + 10% NaCl.https://doi.org/10.1515/eng-2022-0037titaniumcorrosionacid-chlorideheat-treatmentpittingpassivation |
| spellingShingle | Loto Roland Tolulope Effect of heat-treatment processes and high temperature variation of acid-chloride media on the corrosion resistance of B265 (Ti–6Al–4V) titanium alloy in acid-chloride solution Open Engineering titanium corrosion acid-chloride heat-treatment pitting passivation |
| title | Effect of heat-treatment processes and high temperature variation of acid-chloride media on the corrosion resistance of B265 (Ti–6Al–4V) titanium alloy in acid-chloride solution |
| title_full | Effect of heat-treatment processes and high temperature variation of acid-chloride media on the corrosion resistance of B265 (Ti–6Al–4V) titanium alloy in acid-chloride solution |
| title_fullStr | Effect of heat-treatment processes and high temperature variation of acid-chloride media on the corrosion resistance of B265 (Ti–6Al–4V) titanium alloy in acid-chloride solution |
| title_full_unstemmed | Effect of heat-treatment processes and high temperature variation of acid-chloride media on the corrosion resistance of B265 (Ti–6Al–4V) titanium alloy in acid-chloride solution |
| title_short | Effect of heat-treatment processes and high temperature variation of acid-chloride media on the corrosion resistance of B265 (Ti–6Al–4V) titanium alloy in acid-chloride solution |
| title_sort | effect of heat treatment processes and high temperature variation of acid chloride media on the corrosion resistance of b265 ti 6al 4v titanium alloy in acid chloride solution |
| topic | titanium corrosion acid-chloride heat-treatment pitting passivation |
| url | https://doi.org/10.1515/eng-2022-0037 |
| work_keys_str_mv | AT lotorolandtolulope effectofheattreatmentprocessesandhightemperaturevariationofacidchloridemediaonthecorrosionresistanceofb265ti6al4vtitaniumalloyinacidchloridesolution |