【摘要】：目的制備性能良好的Ni-SiC復(fù)合鍍層,以提高海洋平臺(tái)系泊纜用22MnCrNiMo鋼的耐腐蝕性和壽命。方法采用基于離心力的雙脈沖電沉積技術(shù),在海洋平臺(tái)系泊纜用22MnCrNiMo鋼表面制備N(xiāo)i-SiC納米復(fù)合鍍層。通過(guò)掃描電子顯微鏡和光學(xué)顯微鏡對(duì)復(fù)合鍍層的微觀形貌、組織結(jié)構(gòu)進(jìn)行分析。利用靜態(tài)浸泡腐蝕試驗(yàn)分析了鍍層的耐腐蝕性能。結(jié)果添加0.2g/L的SDS時(shí),納米SiC懸浮液具有最佳懸浮性能。納米SiC顆粒的質(zhì)量濃度為2.0~4.0g/L時(shí),有利于獲得優(yōu)異的Ni-SiC鍍層表面形貌。隨著占空比的增加,復(fù)合鍍層表面的晶粒尺寸逐漸減小,當(dāng)占空比為50%時(shí),可以獲得最佳的Ni-SiC鍍層形貌。當(dāng)添加2.0g/L的納米SiC顆粒時(shí),鍍層的腐蝕質(zhì)量損失最小,為2.867mg/cm~2;當(dāng)占空比為50%時(shí),鍍層的腐蝕質(zhì)量損失最小,為3.059mg/cm~2。結(jié)論添加分散劑后,鍍液中的納米SiC顆粒沉降性能變好;添加納米SiC顆粒后,鍍層的耐腐蝕性能增強(qiáng)。納米SiC顆粒的添加量和占空比的大小對(duì)復(fù)合鍍層的組織結(jié)構(gòu)和耐腐蝕性能有重要影響。
[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.
【作者單位】： 江蘇海事職業(yè)技術(shù)學(xué)院船舶與海洋工程學(xué)院;南京工程學(xué)院材料工程學(xué)院;
【基金】：江蘇省高校自然科學(xué)研究面上項(xiàng)目(16KJB580013) 江蘇省高校優(yōu)秀中青年教師和校長(zhǎng)境外研修項(xiàng)目 江蘇高�！扒嗨{(lán)工程”和江蘇海事職業(yè)學(xué)院千帆新銳項(xiàng)目(XR1503)~~
【分類號(hào)】：TE985;TG174.4

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