Low-temperature corrosion performance of laser cladded WB-Co coatings in acidic environment
In this investigation, cobalt-based composite coatings with varying concentrations of spherical tungsten boride (WB) were fabricated via laser cladding technology, specifically focusing on two compositional systems: Co + 15% WB and Co + 45% WB. The electrochemical behavior of these coatings was syst...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2025-07-01
|
| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2025-0082 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849429549322862592 |
|---|---|
| author | Han Lele Fan Li Chen Haiyan Zhu Guangkuo Qin Yujiang Cao Qizheng |
| author_facet | Han Lele Fan Li Chen Haiyan Zhu Guangkuo Qin Yujiang Cao Qizheng |
| author_sort | Han Lele |
| collection | DOAJ |
| description | In this investigation, cobalt-based composite coatings with varying concentrations of spherical tungsten boride (WB) were fabricated via laser cladding technology, specifically focusing on two compositional systems: Co + 15% WB and Co + 45% WB. The electrochemical behavior of these coatings was systematically evaluated in a low-temperature hydrochloric acid environment to elucidate the influence of WB content on the corrosion resistance mechanisms of cobalt-based coatings and to reveal the electrochemical corrosion mechanisms of WB-reinforced cobalt-based coatings. Experimental results demonstrated that all coatings, including pure Co, Co + 15% WB, and Co + 45% WB, exhibited distinct passivation behavior in 0.5 mol·L−1 HCl solution. The passivation range for WB-containing coatings was predominantly observed between −0.1 V and 0.2 V. Comparative analysis revealed that the Co + 15% WB coating exhibited the most favorable corrosion resistance properties, characterized by the highest corrosion potential and the lowest corrosion current density (i
corr). Furthermore, this coating composition demonstrated superior passive film resistance, charge transfer resistance (R
ct), and film resistance (R
f), indicating optimal protective performance in acidic environments. In contrast, the EH40 substrate exhibited significant corrosion susceptibility in acidic solutions, with the corrosion process primarily dominated by anodic dissolution. These findings provide valuable insights for the design and optimization of corrosion-resistant coatings used in marine vessels operating in corrosive acidic environments. |
| format | Article |
| id | doaj-art-9bc42b668a0045b5be7fab778cf71dc1 |
| institution | Kabale University |
| issn | 2191-0324 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj-art-9bc42b668a0045b5be7fab778cf71dc12025-08-20T03:28:19ZengDe GruyterHigh Temperature Materials and Processes2191-03242025-07-01441pp. 404194043510.1515/htmp-2025-0082Low-temperature corrosion performance of laser cladded WB-Co coatings in acidic environmentHan Lele0Fan Li1Chen Haiyan2Zhu Guangkuo3Qin Yujiang4Cao Qizheng5College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, ChinaCollege of Mechanical and Electronic Engineering, Shanghai Jian Qiao University, Shanghai, 201306, ChinaCollege of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, ChinaCollege of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, ChinaCollege of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, ChinaCollege of Materials Science and Engineering, Shanghai University, Shanghai, 200444, ChinaIn this investigation, cobalt-based composite coatings with varying concentrations of spherical tungsten boride (WB) were fabricated via laser cladding technology, specifically focusing on two compositional systems: Co + 15% WB and Co + 45% WB. The electrochemical behavior of these coatings was systematically evaluated in a low-temperature hydrochloric acid environment to elucidate the influence of WB content on the corrosion resistance mechanisms of cobalt-based coatings and to reveal the electrochemical corrosion mechanisms of WB-reinforced cobalt-based coatings. Experimental results demonstrated that all coatings, including pure Co, Co + 15% WB, and Co + 45% WB, exhibited distinct passivation behavior in 0.5 mol·L−1 HCl solution. The passivation range for WB-containing coatings was predominantly observed between −0.1 V and 0.2 V. Comparative analysis revealed that the Co + 15% WB coating exhibited the most favorable corrosion resistance properties, characterized by the highest corrosion potential and the lowest corrosion current density (i corr). Furthermore, this coating composition demonstrated superior passive film resistance, charge transfer resistance (R ct), and film resistance (R f), indicating optimal protective performance in acidic environments. In contrast, the EH40 substrate exhibited significant corrosion susceptibility in acidic solutions, with the corrosion process primarily dominated by anodic dissolution. These findings provide valuable insights for the design and optimization of corrosion-resistant coatings used in marine vessels operating in corrosive acidic environments.https://doi.org/10.1515/htmp-2025-0082laser claddingtungsten borideelectrochemical corrosioncorrosion resistancelow-temperature environment |
| spellingShingle | Han Lele Fan Li Chen Haiyan Zhu Guangkuo Qin Yujiang Cao Qizheng Low-temperature corrosion performance of laser cladded WB-Co coatings in acidic environment High Temperature Materials and Processes laser cladding tungsten boride electrochemical corrosion corrosion resistance low-temperature environment |
| title | Low-temperature corrosion performance of laser cladded WB-Co coatings in acidic environment |
| title_full | Low-temperature corrosion performance of laser cladded WB-Co coatings in acidic environment |
| title_fullStr | Low-temperature corrosion performance of laser cladded WB-Co coatings in acidic environment |
| title_full_unstemmed | Low-temperature corrosion performance of laser cladded WB-Co coatings in acidic environment |
| title_short | Low-temperature corrosion performance of laser cladded WB-Co coatings in acidic environment |
| title_sort | low temperature corrosion performance of laser cladded wb co coatings in acidic environment |
| topic | laser cladding tungsten boride electrochemical corrosion corrosion resistance low-temperature environment |
| url | https://doi.org/10.1515/htmp-2025-0082 |
| work_keys_str_mv | AT hanlele lowtemperaturecorrosionperformanceoflasercladdedwbcocoatingsinacidicenvironment AT fanli lowtemperaturecorrosionperformanceoflasercladdedwbcocoatingsinacidicenvironment AT chenhaiyan lowtemperaturecorrosionperformanceoflasercladdedwbcocoatingsinacidicenvironment AT zhuguangkuo lowtemperaturecorrosionperformanceoflasercladdedwbcocoatingsinacidicenvironment AT qinyujiang lowtemperaturecorrosionperformanceoflasercladdedwbcocoatingsinacidicenvironment AT caoqizheng lowtemperaturecorrosionperformanceoflasercladdedwbcocoatingsinacidicenvironment |