蔡永伟,全学军.模拟地热水环境中Ni-P-ZrO2纳米复合涂层的防腐性能研究[J].表面技术,2018,47(6):232-239.
CAI Yong-wei,QUAN Xue-jun.Anticorrosion Properties of Ni-P-ZrO2 Nanocomposite Coatings in Simulated Geothermal Water[J].Surface Technology,2018,47(6):232-239 |
| 模拟地热水环境中Ni-P-ZrO2纳米复合涂层的防腐性能研究 |
| Anticorrosion Properties of Ni-P-ZrO2 Nanocomposite Coatings in Simulated Geothermal Water |
| 投稿时间：2017-11-26 修订日期：2018-06-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.06.033 |
| 中文关键词: Ni-P-ZrO2 地热水 EIS Tafel 腐蚀 |
| 英文关键词:Ni-P-ZrO2 geothermal water EIS Tafel corrosion |
| 基金项目:重庆市教委科学技术研究应用技术研究项目（KJ1400912）；重庆市科委基础与前沿研究一般项目（cstc2014jcyjA90009） |
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| 中文摘要: |
| 目的 研究Ni-P-ZrO2纳米复合涂层在地热水中的抗腐蚀性能。方法 通过超声分散结合表面活性剂等方式在Ni-P化学镀溶液中添加纳米ZrO2颗粒，在不锈钢基底上制备出Ni-P-ZrO2复合涂层。用SEM和EDS分析涂层的表面形貌和元素组成，并在50 ℃的模拟地热水中使用Tafel和EIS等电化学测试技术分析涂层的抗腐蚀性能。结果 制备出的Ni-P-ZrO2复合涂层致密无孔。Ni-P-ZrO2纳米复合涂层在地热水中的年腐蚀速率相比不锈钢基底下降80%以上，相比Ni-P涂层下降20%以上。Ni-P-ZrO2纳米复合涂层在地热水中腐蚀15 d后，低频处的阻抗|Z|f=0.01 Hz急剧下降，涂层电阻Rct也下降了近两个数量级。结论 相比Ni-P涂层及不锈钢基底，Ni-P-ZrO2纳米复合涂层具有较好的抗腐蚀性能，ZrO2添加量最大的Ni-P-ZrO2纳米复合涂层具有最好的抗腐蚀效果。Ni-P-ZrO2纳米复合涂层经长时间腐蚀浸泡后，抗腐蚀能力明显下降。 |
| 英文摘要: |
| The work aims to study anticorrosion properties of Ni-P-ZrO2 nanocomposite coatings in geothermal water. The Ni-P-ZrO2 nanocomposite coatings were prepared on stainless steel substrates by adding nano-ZrO2 particles into Ni-P electroless plating solution in the methods of ultrasonically dispersion and surfactants addition. Morphology and element composition of the nanocomposite coatings were analyzed with SEM and EDS. The anticorrosion properties of nanocomposite coatings were analyzed by adopting such electrochemical measurement technologies as Tafel and EIS in the simulated geothermal water at 50 ℃. The as-prepared Ni-P-ZrO2 nanocomposite coatings were dense and nonporous. Annual corrosion rate of the Ni-P-ZrO2 nanocomposite coatings in the simulated geothermal water was over 80% lower than that of the coatings on the stainless-steel substrate and over 20% lower than that of Ni-P coatings. Corrosion impedance, |Z|f=0.01 Hz, of the Ni-P-ZrO2 nanocomposite coatings declined sharply after 15 days of corrosion in the simulated geothermal water. Coating resistance, Rct, also decreased by nearly two orders of magnitude. The Ni-P-ZrO2 nanocomposite coatings have higher corrosion resistance compared with that of both Ni-P coating and stainless-steel substrate. Besides, the Ni-P-ZrO2 nanocomposite coatings containing the largest amount of ZrO2 nanoparticles have the best anticorrosion behavior. However, the corrosion resistance of Ni-P-ZrO2 nanocomposite coatings decreases markedly after a long period of corrosion. |
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