本文選題：AA5052　切入點：超疏水　出處：《西北農(nóng)林科技大學(xué)》2017年碩士論文

【摘要】：鋁及其合金是一類重要的金屬材料,由于其在自然界中含量豐富、易于加工并且具有較高的機械強度,因此鋁合金在航空航天、國防工程以及家電行業(yè)的應(yīng)用十分廣泛。然而由于鋁合金在潮濕的環(huán)境中極易被腐蝕從而嚴重限制了其應(yīng)用范圍。因此需要在鋁合金表面制備一層保護薄膜以提高其防腐蝕性能。本實驗通過化學(xué)鍍膜以及自組裝6-N-烯丙基-N-1,1,2,2-四氫氟代癸烷基胺-1,3,5-三嗪-2,4-硫醇單鈉鹽(簡稱AF17N)成功在AA5052型鋁合金表面構(gòu)建了具有高防腐蝕性的超疏水薄膜。通過單因素試驗法探索了化學(xué)鍍鎳的最佳條件,通過正交試驗法系統(tǒng)探索了電化學(xué)沉積鎳鈷以及自組裝AF17N的最佳條件。結(jié)果表明化學(xué)鍍鎳的最優(yōu)實驗方法為:AA5052樣片在p H為6.2~6.4的化學(xué)鍍液中,于75℃化學(xué)鍍鎳40min。電化學(xué)沉積鎳鈷鍍層的最優(yōu)實驗方法為:在電流密度為3 m A/cm2時,將AA5052樣片置于50℃的電鍍液中電鍍360 s。采用正交試驗法,得出自組裝AF17N的最優(yōu)試驗方法為:AA5052樣片在1.5 m M的AF17N單體自組裝溶液中,于35℃下自組裝4 h后,再在110℃下固化25 min。對自組裝膜進行多種表征。通過掃描電子顯微鏡和靜態(tài)接觸角儀對樣片表面形貌和潤濕性進行了測試。測試表明,經(jīng)過電沉積鎳鈷后樣片表面形成了微納米雙極結(jié)構(gòu),進一步修飾了AF17N之后,樣片表面呈現(xiàn)了接觸角高達160°同時滑動角低至1°的超疏水效果。能量色散X射線光譜(EDX)中的原子百分數(shù)(At%)和元素的重量百分數(shù)(Wt%)數(shù)據(jù)結(jié)果分別證明了化學(xué)鍍層、電化學(xué)鍍層以及AF17N自組裝膜的成功制備。通過動電位極化曲線和電化學(xué)阻抗(EIS)測試了超疏水薄膜的防腐蝕效果,超疏水薄膜的保護效率高達99.34%,表現(xiàn)出了良好的防腐蝕性能。同時通過循環(huán)伏安法分別對電鍍鎳鈷后的鋁合金表面以及超疏水薄膜修飾的AA5052鋁合金的致密性進行了測試。所有測試結(jié)果均表明樣片的防腐蝕效果明顯優(yōu)于空白,說明實驗制備的超疏水薄膜對AA50052型鋁合金基體有良好的防腐蝕效果。
[Abstract]:Aluminum and its alloys are a kind of important metal materials. Because of their rich content in nature, easy processing and high mechanical strength, aluminum alloys are widely used in aerospace, national defense engineering and household appliances industry.However, aluminum alloy is very easy to be corroded in wet environment, which seriously limits its application scope.Therefore, it is necessary to prepare a protective film on the surface of aluminum alloy to improve its corrosion resistance.In this paper, the superhydrophobic films with high corrosion resistance were successfully constructed on the surface of AA5052 aluminum alloy by electroless plating and self-assembly of 6-N- allyl-N-1- (1-1) -2-tetrahydrofluorodecylamine (THF) -3H _ (3) -5-triazine -2N (AF17N) sodium monosodium salt (AF17N) on the surface of AA5052 aluminum alloy.The optimum conditions of electroless nickel plating were investigated by single factor test, and the optimum conditions of electrodeposition of nickel and cobalt and self-assembled AF17N were investigated by orthogonal test.The results show that the optimal experimental method for electroless nickel plating is as follows: the sample sample: AA5052 is electroless at 75 鈩，

本文編號：1702354