| 包覆TiO2保护层抑制磷化镍钴在水中腐蚀 |
| Corrosion inhibition of nickel-cobalt-phosphide in water by coating TiO2 layer |
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| 摘要: 本工作研究了镍钴双金属磷化物(Ni-Co-P)在水溶液中的稳定性。结果显示，Ni-Co-P能与H2O反应，发生自腐蚀生成Ni2+、Co2+和PO43-离子，同时产生H2。Ni-Co-P与H2O的自腐蚀反应速率受到镍钴比例影响，Ni-Co-P中的Co含量升高，其在水中的腐蚀速率降低。详细研究了镍、钴投料比(nNi/nCo)为1∶2制备的Ni-Co-P在水中的腐蚀行为，其在水中的腐蚀速率与溶液pH值、氧气含量、光照、温度等因素有关。为了抑制Ni-Co-P (nNi/nCo=1/2)在水溶液中的腐蚀，在其表面包裹一层惰性TiO2保护层，这层TiO2保护层能有效减缓Ni-Co-P在水中的腐蚀，增强其稳定性。 |
| 关键词: 双金属磷化物 水溶液 稳定性 TiO2保护层 |
| 基金项目: 科技部重点研发项目(No.2022YFB3803600)和国家自然科学基金(No.22272189，22102200)资助。 |
| Abstract: This work studied the corrosion and corrosion inhibition of nickel-cobalt bimetallic phosphide (Ni-Co-P) in aqueous solution. The results show that Ni-Co-P could react with H2O to produce H2, while Ni2+, Co2+, and PO43- ions were released into water. The nickel-to-cobalt ratio affects the reaction rate of Ni-Co-P with H2O, and increased Co content in Ni-Co-P leads to decreased corrosion rate. The influence factors, such as pH value, oxygen content, light, and temperature on the corrosion of Ni-Co-P(nNi/nCo=1/2) prepared with an initial nickel-to-cobalt ratio of 1∶2 in water were studied in detail. To inhibit the corrosion of Ni-Co-P(nNi/nCo=1/2) in aqueous solution, a strategy of coating an inert TiO2 protective layer was put forward. The TiO2 protective layer could effectively reduce the corrosion of Ni-Co-P in water and enhance its stability. |
| Keywords: bimetallic phosphide aqueous solution stability TiO2 protection layer |
| 投稿时间：2024-02-27 修订日期：2024-09-21 |
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| 杨博,吕功煊,马建泰.包覆TiO2保护层抑制磷化镍钴在水中腐蚀[J].无机化学学报,2025,41(2):365-384. |
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