鎂鋰合金的腐蝕機(jī)理及表面防護(hù)方法研究進(jìn)展
發(fā)布時間:2018-12-17 17:59
【摘要】:鎂鋰(Mg-Li)合金具有質(zhì)量超輕、強(qiáng)度高、延展性好和成形性好等優(yōu)點(diǎn),在汽車、航空航天、軍事及核工業(yè)等領(lǐng)域具有廣闊的應(yīng)用前景。但是高化學(xué)活性的鋰使該合金易在使用環(huán)境中發(fā)生腐蝕且難以防護(hù),限制了其廣泛應(yīng)用。因此,研究Mg-Li合金的腐蝕機(jī)理并發(fā)展有效的防腐蝕技術(shù)極為重要;诮陙韲鴥(nèi)外的研究進(jìn)展,本文綜述了Mg-Li合金在大氣、中性及堿性NaCl溶液和模擬人體體液中的腐蝕機(jī)理,介紹了Mg-Li合金在不同環(huán)境中的腐蝕過程。同時對Mg-Li合金的表面防護(hù)方法作了系統(tǒng)總結(jié),包括陽極氧化、電鍍與化學(xué)鍍、化學(xué)轉(zhuǎn)化、涂層及其他表面防腐蝕方法,分析了各種表面防護(hù)方法的特點(diǎn)、優(yōu)勢與不足。并對Mg-Li合金表面防護(hù)的未來發(fā)展進(jìn)行了展望,提出通過涂層的復(fù)合化、功能化及自修復(fù)化可以提高涂層對Mg-Li合金的防腐蝕性能和實(shí)用性。
[Abstract]:Magnesium-lithium (Mg-Li) alloys have the advantages of super light weight, high strength, good ductility and good formability, etc., and have broad application prospects in automotive, aerospace, military and nuclear industries. However, the high chemical activity of lithium makes the alloy easy to corrode in the use environment and difficult to protect, which limits its wide application. Therefore, it is very important to study the corrosion mechanism of Mg-Li alloy and develop effective anticorrosion technology. Based on the recent research progress at home and abroad, the corrosion mechanism of Mg-Li alloys in atmospheric, neutral and alkaline NaCl solutions and simulated body fluids is reviewed, and the corrosion process of Mg-Li alloys in different environments is introduced. At the same time, the surface protection methods of Mg-Li alloy are summarized systematically, including anodic oxidation, electroplating and electroless plating, chemical conversion, coating and other surface corrosion protection methods. The characteristics, advantages and disadvantages of various surface protection methods are analyzed. The future development of surface protection of Mg-Li alloy is prospected. It is suggested that the corrosion resistance and practicability of the coating to Mg-Li alloy can be improved by the composite, functionalization and self-repair of the coating.
【作者單位】: 哈爾濱工程大學(xué)材料科學(xué)與化學(xué)工程學(xué)院;齊齊哈爾大學(xué)化學(xué)與化學(xué)工程學(xué)院;齊齊哈爾大學(xué)材料科學(xué)與工程學(xué)院;
【基金】:國家自然科學(xué)基金項目(51574097)
【分類號】:TG174.4
[Abstract]:Magnesium-lithium (Mg-Li) alloys have the advantages of super light weight, high strength, good ductility and good formability, etc., and have broad application prospects in automotive, aerospace, military and nuclear industries. However, the high chemical activity of lithium makes the alloy easy to corrode in the use environment and difficult to protect, which limits its wide application. Therefore, it is very important to study the corrosion mechanism of Mg-Li alloy and develop effective anticorrosion technology. Based on the recent research progress at home and abroad, the corrosion mechanism of Mg-Li alloys in atmospheric, neutral and alkaline NaCl solutions and simulated body fluids is reviewed, and the corrosion process of Mg-Li alloys in different environments is introduced. At the same time, the surface protection methods of Mg-Li alloy are summarized systematically, including anodic oxidation, electroplating and electroless plating, chemical conversion, coating and other surface corrosion protection methods. The characteristics, advantages and disadvantages of various surface protection methods are analyzed. The future development of surface protection of Mg-Li alloy is prospected. It is suggested that the corrosion resistance and practicability of the coating to Mg-Li alloy can be improved by the composite, functionalization and self-repair of the coating.
【作者單位】: 哈爾濱工程大學(xué)材料科學(xué)與化學(xué)工程學(xué)院;齊齊哈爾大學(xué)化學(xué)與化學(xué)工程學(xué)院;齊齊哈爾大學(xué)材料科學(xué)與工程學(xué)院;
【基金】:國家自然科學(xué)基金項目(51574097)
【分類號】:TG174.4
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