【摘要】：目的為了提高鋼材表面的耐腐蝕性能。方法采用含正硅酸乙酯(TEOS)的硅烷液,在40Cr合金鋼表面制備TEOS改進硅烷保護膜,并采用正交試驗法優(yōu)選出了最佳TEOS改進硅烷液的工藝參數(shù)。采用掃描電子顯微鏡(SEM)、中性鹽霧實驗失重法、電化學(xué)阻抗法和極化法對其成膜性能和耐腐蝕性進行測試。結(jié)果 TEOS改進硅烷膜的耐硫酸銅腐蝕時間相對于硅烷膜提高了近50%。電化學(xué)極化測試可以看到TEOS改進硅烷膜的腐蝕電位正移,腐蝕電流密度大幅度下降至1.883×10-6 A/cm2。電化學(xué)阻抗譜測試中,在阻抗-頻率Bode圖中低頻區(qū),雜化硅烷膜試樣的阻抗值大于硅烷膜試樣的阻抗值,表現(xiàn)出良好的抗腐蝕性能;相角-頻率Bode圖顯示TEOS改進硅烷膜在中高頻區(qū)出現(xiàn)一個寬大的平臺區(qū),而且在中高頻區(qū)相位角度數(shù)大于硅烷膜的相位角度數(shù),表現(xiàn)出良好的容抗性能,表明TEOS改進硅烷膜能大幅度提高40Cr的耐腐蝕性。結(jié)論所制備的TEOS改進硅烷保護膜具有較好的成膜性,該硅烷膜堅實致密,且所形成的膜結(jié)構(gòu)具有較好的耐腐蝕性能。
[Abstract]:Aim to improve the corrosion resistance of steel surface. Methods Silane solution containing ethyl orthosilicate (TEOS) was used to prepare TEOS modified silane protective film on the surface of 40Cr alloy steel. The optimum process parameters of TEOS modified silane solution were selected by orthogonal test. The film forming properties and corrosion resistance were measured by (SEM), neutral salt spray method, electrochemical impedance method and polarization method. Results the corrosion resistance time of TEOS improved silane film was about 50% higher than that of silane film. Electrochemical polarization test shows that the corrosion potential of TEOS modified silane film is positively shifted, and the corrosion current density decreases to 1.883 脳 10 ~ (-6) A / cm ~ (2). In electrochemical impedance spectroscopy, the impedance of hybrid silane film is larger than that of silane film in the low frequency region of impedance frequency Bode diagram, which shows good corrosion resistance. The phase angle-frequency Bode diagram shows that the TEOS modified silane film has a wide platform region in the middle and high frequency region, and the phase angle degree in the middle and high frequency region is larger than the phase angle degree of the silane film, which shows good capacitive reactance. The results show that TEOS can greatly improve the corrosion resistance of 40Cr by improving the silane film. Conclusion the TEOS modified silane protective film has good film-forming property, the silane film is solid and compact, and the structure of the film has good corrosion resistance.
【作者單位】： 江南大學(xué)機械工程學(xué)院;無錫創(chuàng)明傳動工程有限公司;
【基金】：江蘇省自然科學(xué)基金項目(BK20130152) 高等學(xué)校博士學(xué)科點專項科研基金資助項目(20130093120010)~~
【分類號】：TG174.462

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