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45鋼表面PII-DGPSM復(fù)合強(qiáng)化層的耐腐蝕性能研究
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南京航空航天大學(xué),南京航空航天大學(xué),南京航空航天大學(xué),南京航空航天大學(xué)

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TG174.445

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國家自然科學(xué)基金(項(xiàng)目號51371097),六大人才高峰項(xiàng)目(項(xiàng)目號YPC16005-PT),江蘇省高校優(yōu)勢學(xué)科建設(shè)工程項(xiàng)目


Investigation of corrosion resistance of PII-DGPSM composite strengthened layer on the surface of 45 steel
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College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing

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    摘要:

    針對海工裝備中常用45鋼表面耐腐蝕性不足的問題，采用離子注入技術(shù)(PII)注Al和雙輝等離子表面冶金技術(shù)(DGPSM)滲Cr復(fù)合，在基體45鋼表面制備Al-Cr復(fù)合強(qiáng)化層。利用X射線衍射(XRD)、光電子能譜(XPS)、原子力顯微鏡(AFM)、掃描電鏡(SEM)和能譜(EDS)等對試樣的元素分布、物相結(jié)構(gòu)進(jìn)行表征。并采用極化曲線和電化學(xué)阻抗譜，對比分析Al-Cr復(fù)合涂層、注Al涂層和基體在3.5wt%NaCl溶液中的耐腐蝕性，研究其腐蝕機(jī)理。研究表明，采用復(fù)合技術(shù)制備所得Al-Cr涂層的耐腐蝕性最佳，其表面形成Cr2O3和Al2O3復(fù)合鈍化膜，和涂層內(nèi)部形成具有優(yōu)異耐腐蝕性Fe2AlCr和Al8Cr5相，阻礙Cl-的腐蝕作用；注Al層耐腐蝕性次之，其表面形成致密Al2O3鈍化膜，延緩了Cl-對基體的腐蝕作用；基體耐腐蝕性最差。

    Abstract:

    Aiming at improving the corrosion resistance of 45 steel used in maritime works, an Al-Cr composite alloyed layer is deposited on the surface of 45 steel via a composite technique of plasma ion implantation (PII) and double glow plasma surface metallurgy (DGPSM). Element distributions and phase structures of the Al-Cr composite alloyed layer are investigated via X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Atomic force microscope (AFM), Scanning electron microscope (SEM) and Energy dispersive spectroscopy (EDS). Polarization curves and electrochemical impedance spectroscopy (EIS) are used to study the corrosion resistance and the corrosion mechanisms of the Al-Cr composite alloyed layer, the Al implanted layer and 45 steel in 3.5 wt% NaCl solution. The results show that the Al-Cr composite alloyed layer reveals the best corrosion resistance. The formation of Cr2O3 and Al2O3 as passive films on the surface of the Al-Cr composite alloyed layer, and the inner Fe2AlCr and Al8Cr5 phases with excellent corrosion resistance, hindering the corrosion of Cl- ions effectively. The Al implanted layer exhibits moderate corrosion resistance due to the formation of Al2O3 passive film. The substrate of 45 steel shows the worst corrosion resistance.

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羅西希,姚正軍,張平則,周克印.45鋼表面PII-DGPSM復(fù)合強(qiáng)化層的耐腐蝕性能研究[J].稀有金屬材料與工程,2018,47(10):3127~3133.[Xixi Luo, Zhengjun Yao, Pingze Zhang, Keyin Zhou. Investigation of corrosion resistance of PII-DGPSM composite strengthened layer on the surface of 45 steel[J]. Rare Metal Materials and Engineering,2018,47(10):3127~3133.]
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  • 收稿日期:2016-12-21
  • 最后修改日期:2017-03-13
  • 錄用日期:2017-03-16
  • 在線發(fā)布日期: 2018-11-08
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