HAN Erfeng*,HUANG Rui.Corrosion Resistance and Scale-Inhibiting Property of Electroless Ni-W-P/PTFE Composite Coating on Surface of Mechanical Structural Steel[J].Plating & Finishing,2022,(9):9-14.[doi:10.3969/j.issn.1001-3849.2022.09.002]
机械结构钢化学镀Ni-W-P/PTFE复合镀层的耐蚀阻垢性能
- Title:
- Corrosion Resistance and Scale-Inhibiting Property of Electroless Ni-W-P/PTFE Composite Coating on Surface of Mechanical Structural Steel
- 关键词:
- 化学镀; Ni-W-P/PTFE 复合镀层; 耐蚀性能; 阻垢性能; PTFE 颗粒浓度
- Keywords:
- electroless plating ; Ni-W-P/PTFE composite coating ; corrosion resistance ; scale-inhibiting property ; concentration of PTFE particles
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 选取机械结构钢 40Cr 作为研究对象，通过改变聚四氟乙烯（ PTFE ）颗粒浓度制备 5 种化学镀 Ni-W-P/PTFE 复合镀层，并研究复合镀层的形貌和耐蚀阻垢性能。结果表明：不同 PTFE 颗粒浓度下制备的 5 种复合镀层表面都较致密，并且附着有 PTFE 颗粒。随着 PTFE 颗粒浓度的增加，复合镀层表面粗糙度呈先减小后增大的趋势， PTFE 颗粒复合量先增多后减少，并且 PTFE 颗粒在复合镀层表面分布状态不同，由稀疏分布转为较均匀密集分布然后出现聚集现象，导致 5 种复合镀层的耐蚀阻垢性能存在差异。当 PTFE 颗粒浓度为 10 g/L 时，复合镀层表面平整度相对较好，表现出良好的耐蚀性能，电荷转移电阻和阻抗模值分别达到 3.61×10 4 Ω ·cm 2 和 1.25×10 4 Ω ·cm 2 。并且该复合镀层表面 PTFE 颗粒呈较均匀密集的分布状态，阻止垢质粘附能力较强，结垢速率仅为 12.71 mg/m 2 ，同样表现出良好的阻垢性能。
- Abstract:
- ： Five electroless Ni-W-P/PTFE composite coatings were prepared on surface of mechanical structure steel 40Cr by changing the concentration of PTFE particles ， and the morphology and corrosion resistance and scale-inhibiting property of the composite coatings were investigated. The results show that the surface of five composite coatings prepared under different concentration of PTFE particles is compact and with adsorbed PTFE particles. With the increase of the concentration of PTFE particles ， the surface roughness of the composite coatings decreases firstly and then increases ， and the amount of PTFE particles increases firstly and then decreases. Moreover ， the distributions of PTFE particles on surface of the composite coatings is different ， from sparse distribution to more uniform and dense distribution and then aggregation phenomenon occurs ， leading to the difference of corrosion resistance and scale-inhibiting property of five composite coatings. When the concentration of PTFE particles is 10 g/L ， the composite coating has relatively good surface evenness and exhibits better corrosion resistance ， the charge transfer resistance and impedance modulus value reaches to 3.61×10 4 Ω ·cm 2 and 1.25×10 4 Ω ·cm 2 respectively. Moreover ， PTFE particles distribute evenly and densely on surface of the composite coating ， and the scaling rate is only 12.71 mg/m 2 ， which indicates that the composite coating also show good scale-inhibiting property.
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备注/Memo
收稿日期： 2021-03-16 修回日期： 2021-05-07 * 通信作者： 韩二锋（ 1981 ―），男，硕士，副教授，主要研究方向：汽车发动机、汽车材料及其表面处理， email ： erfeng_han@126.com 基金项目： 2019 年浙江省大学生科技创新活动暨新苗人才计划项目（ 2019R447001 ）； 2022 年浙江农业商贸职业学院院级科研创新团队：绍兴智慧农业与与美丽乡村创新服务团队?/html>