鋁表面存在的致密氧化層對鋁基體上電鍍?nèi)齼r鉻涂層具有強阻礙作用。純鋁基體上薄的鋅酸鹽中間層可使三價鉻鍍層和多壁碳納米管復(fù)合的三價鉻鍍層成功鍍覆。采用鋅酸鹽中間層對純鋁基體上三價鉻沉積影響顯著,獲得的三價鉻鍍層和鉻/多壁碳納米管復(fù)合鍍層有效提高了純鋁的耐磨和抗蝕性能。電鍍溫度、電鍍時間和鍍液pH值等工藝參數(shù)對三價鉻鍍層的厚度、均勻性及顯微結(jié)構(gòu)具有較大影響。在電流密度為30A/dm2時,溫度30℃,pH值為2,時間40分鐘,含有鋅酸鹽中間層的三價鉻鍍層和鉻/多壁碳納米管復(fù)合鍍層厚度均勻,均可達35μm,鉻/多壁碳納米管復(fù)合鍍層無空洞和裂紋。采用響應(yīng)面分析法（RSM）數(shù)學建模,通過統(tǒng)計計算了不同工藝條件鍍層厚度的形成規(guī)律。X射線衍射譜（XRD）分析結(jié)果表明,與鉻/多壁碳納米管復(fù)合鍍層相比三價鉻鍍層具有非晶結(jié)構(gòu)。碳納米管的加入使鉻/多壁碳納米管復(fù)合鍍層的硬度由三價鉻鍍層的HV1N8.0-8.3GPa略提高到HV1N.2-9.8GPa。摩擦學實驗結(jié)果表明,與三價鉻鍍層相比較,鉻/多壁碳納米管鍍層耐磨性能顯著提高。在0.5N-2N載荷下,比磨損率降低了約30-40%。利用裂紋橋接聯(lián)合模型,解釋了多壁... 

【文章來源】：大連理工大學遼寧省 211工程院校 985工程院校 教育部直屬院校

【文章頁數(shù)】：120 頁

【學位級別】：博士

【文章目錄】：
Abstract
摘要
CONTENTS
中文目錄
1 Introduction
    1.1 Aluminum Substrate
        1.1.1 Corrosion Properties of Pure Aluminum
        1.1.2 Mechanical Properties ofPure Aluminum
    1.2 Trivalent Chromium Coating
        1.2.1 Electroplating of Trivalent Chromium Coating
        1.2.2 Solution Components
        1.2.3 Crack Formation and Improvement Method
        1.2.4 Mathematical Modeling and Designing
        1.2.5 Mechanical Properties of Trivalent Chromium coating
        1.2.6 Corrosion Properties of Trivalent Chromium Coating
    1.3 Trivalent Chromium Composite Coating
    1.4 Research Aims and Contents
2 Electroplating Process and Measurement Methods
    2.1 Substrate Materials and Preparation
    2.2 Trivalent Chromium Deposition Process
    2.3 Mathematical Modeling
    2.4 Composition
    2.5 Tribological Properties
    2.6 Corrosion Properties
3 Composition and Structure of the Chromium Coatings
    3.1. Zincates Interlayer
    3.2 Trivalent Chromium Coating
        3.2.1 Current Efficiency
        3.2.2 Mathematical Modeling
        3.2.3 Surface Morphology
    3.3 Chromium Composite Coating with MWCNTs
        3.3.1 Mathematical Modeling
        3.3.2 Surface Morphology
        3.3.3 Composition and Microstructure
    3.4. Discussion
    3.5 Summary
4 Tribological Properties of The Chromium Coatings
    4.1 Hardness
    4.2 Coefficient of Friction
    4.3 Wear Resistance
    4.4 Discussion
    4.5 Summary
5 Corrosion Properties of The Chromium Coatings
    5.1 Anodic Polarization
    5.2 Electrochemical Impedance Spectroscopy（EIS）
    5.3 Discussion
    5.4 Summary
6 Conclusions
Abstract of Innovation Points
References
Published Academic Theses during PhD Period
Acknowledgement
About the Author


【參考文獻】：
期刊論文
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