Response of the Metastable Pitting Corrosion of Laser Powder Bed Fusion Produced Ti–6Al–4V to H<sup>+</sup> Concentration Changes
There is limited research on metastable pitting corrosion in an acidic environment, and acid is a major challenge for material corrosion. Therefore, this work investigated the metastable pitting corrosion of laser powder bed fusion (LPBF)-produced Ti–6Al–4V, in Hank’s solution, at different pH value...
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MDPI AG
2023-03-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/3/514 |
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| author | Yuwei Cui Liangyu Chen Liqiang Wang Jun Cheng Laichang Zhang |
| author_facet | Yuwei Cui Liangyu Chen Liqiang Wang Jun Cheng Laichang Zhang |
| author_sort | Yuwei Cui |
| collection | DOAJ |
| description | There is limited research on metastable pitting corrosion in an acidic environment, and acid is a major challenge for material corrosion. Therefore, this work investigated the metastable pitting corrosion of laser powder bed fusion (LPBF)-produced Ti–6Al–4V, in Hank’s solution, at different pH values (pH = 3, 5, and 7). This work investigated the effect of acid on the characteristics of passive films, as well as the change in metastable pitting behavior. Based on the results of electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS), the passive film will be inhibited and dissolved under the influence of H<sup>+</sup>. The higher the concentration of H<sup>+</sup>, the thinner the passive film. Potentiodynamic polarization tests reveal that LPBFed Ti–6Al–4V in Hank’s solution, at pH 3, has more obvious metastable pitting corrosion. This is because the higher the H<sup>+</sup> concentration, the more Cl<sup>-</sup> is adsorbed on the surface of the passive film, which is prone to generate soluble chlorides by competitive adsorption with oxygen atoms and thus develop into metastable pitting corrosion. |
| first_indexed | 2024-03-11T06:11:50Z |
| format | Article |
| id | doaj.art-ede87d5ce4bd449d976c337f47df0cf6 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T06:11:50Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-ede87d5ce4bd449d976c337f47df0cf62023-11-17T12:38:49ZengMDPI AGMetals2075-47012023-03-0113351410.3390/met13030514Response of the Metastable Pitting Corrosion of Laser Powder Bed Fusion Produced Ti–6Al–4V to H<sup>+</sup> Concentration ChangesYuwei Cui0Liangyu Chen1Liqiang Wang2Jun Cheng3Laichang Zhang4School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, ChinaState Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, ChinaShaanxi Key Laboratory of Biomedical Metal Materials, Northwest Institute for Nonferrous Metal Research, Xi’an 710016, ChinaSchool of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, AustraliaThere is limited research on metastable pitting corrosion in an acidic environment, and acid is a major challenge for material corrosion. Therefore, this work investigated the metastable pitting corrosion of laser powder bed fusion (LPBF)-produced Ti–6Al–4V, in Hank’s solution, at different pH values (pH = 3, 5, and 7). This work investigated the effect of acid on the characteristics of passive films, as well as the change in metastable pitting behavior. Based on the results of electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS), the passive film will be inhibited and dissolved under the influence of H<sup>+</sup>. The higher the concentration of H<sup>+</sup>, the thinner the passive film. Potentiodynamic polarization tests reveal that LPBFed Ti–6Al–4V in Hank’s solution, at pH 3, has more obvious metastable pitting corrosion. This is because the higher the H<sup>+</sup> concentration, the more Cl<sup>-</sup> is adsorbed on the surface of the passive film, which is prone to generate soluble chlorides by competitive adsorption with oxygen atoms and thus develop into metastable pitting corrosion.https://www.mdpi.com/2075-4701/13/3/514laser powder bed fusionTi–6Al–4Vmetastable pitting corrosionpassive filmcompetitive adsorption |
| spellingShingle | Yuwei Cui Liangyu Chen Liqiang Wang Jun Cheng Laichang Zhang Response of the Metastable Pitting Corrosion of Laser Powder Bed Fusion Produced Ti–6Al–4V to H<sup>+</sup> Concentration Changes Metals laser powder bed fusion Ti–6Al–4V metastable pitting corrosion passive film competitive adsorption |
| title | Response of the Metastable Pitting Corrosion of Laser Powder Bed Fusion Produced Ti–6Al–4V to H<sup>+</sup> Concentration Changes |
| title_full | Response of the Metastable Pitting Corrosion of Laser Powder Bed Fusion Produced Ti–6Al–4V to H<sup>+</sup> Concentration Changes |
| title_fullStr | Response of the Metastable Pitting Corrosion of Laser Powder Bed Fusion Produced Ti–6Al–4V to H<sup>+</sup> Concentration Changes |
| title_full_unstemmed | Response of the Metastable Pitting Corrosion of Laser Powder Bed Fusion Produced Ti–6Al–4V to H<sup>+</sup> Concentration Changes |
| title_short | Response of the Metastable Pitting Corrosion of Laser Powder Bed Fusion Produced Ti–6Al–4V to H<sup>+</sup> Concentration Changes |
| title_sort | response of the metastable pitting corrosion of laser powder bed fusion produced ti 6al 4v to h sup sup concentration changes |
| topic | laser powder bed fusion Ti–6Al–4V metastable pitting corrosion passive film competitive adsorption |
| url | https://www.mdpi.com/2075-4701/13/3/514 |
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