系泊缆用22MnCrNiMo钢表面纳米复合镀层的制备
发布时间：2018-07-27 10:10
【摘要】：目的制备性能良好的Ni-SiC复合镀层,以提高海洋平台系泊缆用22MnCrNiMo钢的耐腐蚀性和寿命。方法采用基于离心力的双脉冲电沉积技术,在海洋平台系泊缆用22MnCrNiMo钢表面制备Ni-SiC纳米复合镀层。通过扫描电子显微镜和光学显微镜对复合镀层的微观形貌、组织结构进行分析。利用静态浸泡腐蚀试验分析了镀层的耐腐蚀性能。结果添加0.2g/L的SDS时,纳米SiC悬浮液具有最佳悬浮性能。纳米SiC颗粒的质量浓度为2.0~4.0g/L时,有利于获得优异的Ni-SiC镀层表面形貌。随着占空比的增加,复合镀层表面的晶粒尺寸逐渐减小,当占空比为50%时,可以获得最佳的Ni-SiC镀层形貌。当添加2.0g/L的纳米SiC颗粒时,镀层的腐蚀质量损失最小,为2.867mg/cm~2;当占空比为50%时,镀层的腐蚀质量损失最小,为3.059mg/cm~2。结论添加分散剂后,镀液中的纳米SiC颗粒沉降性能变好;添加纳米SiC颗粒后,镀层的耐腐蚀性能增强。纳米SiC颗粒的添加量和占空比的大小对复合镀层的组织结构和耐腐蚀性能有重要影响。
[Abstract]:Aim to improve the corrosion resistance and life of 22MnCrNiMo steel for offshore platform mooring cable by preparing Ni-SiC composite coating with good performance. Methods Ni-SiC nanocomposite coatings were prepared on the surface of 22MnCrNiMo steel for mooring cables of offshore platform by double pulse electrodeposition based on centrifugal force. The microstructure and microstructure of the composite coating were analyzed by scanning electron microscope (SEM) and optical microscope (OM). The corrosion resistance of the coating was analyzed by static immersion corrosion test. Results when SDS was added with 0.2g/L, the suspension of nanometer SiC had the best suspension performance. When the mass concentration of SiC nanoparticles is 2.0~4.0g/L, the excellent surface morphology of Ni-SiC coating can be obtained. With the increase of duty cycle, the grain size of the composite coating decreases gradually, and the best morphology of Ni-SiC coating can be obtained when the duty cycle is 50. When the 2.0g/L nanoparticles were added, the corrosion mass loss of the coating was the smallest (2.867 mg / cm ~ (-2), and when the duty cycle was 50, the corrosion mass loss of the coating was the least (3.059 mg / cm ~ (-2). Conclusion with the addition of dispersant, the deposition property of SiC nanoparticles in the plating solution is better, and the corrosion resistance of the coating is enhanced with the addition of nano SiC particles. The addition and duty cycle of SiC nanoparticles have an important effect on the microstructure and corrosion resistance of the composite coatings.
【作者单位】： 江苏海事职业技术学院船舶与海洋工程学院;南京工程学院材料工程学院;
【基金】：江苏省高校自然科学研究面上项目(16KJB580013) 江苏省高校优秀中青年教师和校长境外研修项目 江苏高校“青蓝工程”和江苏海事职业学院千帆新锐项目(XR1503)~~
【分类号】：TE985;TG174.4
本文编号：2147492
[Abstract]:Aim to improve the corrosion resistance and life of 22MnCrNiMo steel for offshore platform mooring cable by preparing Ni-SiC composite coating with good performance. Methods Ni-SiC nanocomposite coatings were prepared on the surface of 22MnCrNiMo steel for mooring cables of offshore platform by double pulse electrodeposition based on centrifugal force. The microstructure and microstructure of the composite coating were analyzed by scanning electron microscope (SEM) and optical microscope (OM). The corrosion resistance of the coating was analyzed by static immersion corrosion test. Results when SDS was added with 0.2g/L, the suspension of nanometer SiC had the best suspension performance. When the mass concentration of SiC nanoparticles is 2.0~4.0g/L, the excellent surface morphology of Ni-SiC coating can be obtained. With the increase of duty cycle, the grain size of the composite coating decreases gradually, and the best morphology of Ni-SiC coating can be obtained when the duty cycle is 50. When the 2.0g/L nanoparticles were added, the corrosion mass loss of the coating was the smallest (2.867 mg / cm ~ (-2), and when the duty cycle was 50, the corrosion mass loss of the coating was the least (3.059 mg / cm ~ (-2). Conclusion with the addition of dispersant, the deposition property of SiC nanoparticles in the plating solution is better, and the corrosion resistance of the coating is enhanced with the addition of nano SiC particles. The addition and duty cycle of SiC nanoparticles have an important effect on the microstructure and corrosion resistance of the composite coatings.
【作者单位】： 江苏海事职业技术学院船舶与海洋工程学院;南京工程学院材料工程学院;
【基金】：江苏省高校自然科学研究面上项目(16KJB580013) 江苏省高校优秀中青年教师和校长境外研修项目 江苏高校“青蓝工程”和江苏海事职业学院千帆新锐项目(XR1503)~~
【分类号】：TE985;TG174.4
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