本文選題：工藝參數(shù) + 鋁鎂合金��； 參考：《表面技術(shù)》2017年05期

【摘要】：目的以AlCl_3和LiAlH_4為溶質(zhì),苯和四氫呋喃為溶劑,進(jìn)行電沉積鋁鎂合金,探索制備鋁鎂合金的最佳工藝條件。方法在AlCl_3-LiAlH_4-苯-四氫呋喃體系中,采用鎂作陽(yáng)極,通過(guò)預(yù)電沉積獲得一定濃度的Mg~(2+),從而進(jìn)行電沉積制備鋁鎂合金鍍層。改變電流密度、沉積時(shí)間、預(yù)電沉積時(shí)間和預(yù)電沉積次數(shù)等參數(shù),以探究工藝參數(shù)對(duì)鋁鎂鍍層的形貌、晶粒大小和鎂含量的影響,并通過(guò)SEM和EDS檢測(cè)和分析鋁鎂合金的鍍層形貌、成分及含量。結(jié)果鍍層主要成分為Al_3Mg_2和Al_(12)Mg_(17),當(dāng)電流密度為16.67 m A/cm~2時(shí),獲得的鍍層表面效果最好,其晶粒尺寸可達(dá)1~2mm。預(yù)電沉積次數(shù)越多,通過(guò)預(yù)電沉積獲得的Mg~(2+)越多,鋁鎂合金鍍層中鎂的含量越高,最高可達(dá)2.93%(質(zhì)量分?jǐn)?shù))。結(jié)論在一定范圍內(nèi),鍍層中的鎂含量隨預(yù)電沉積時(shí)間的增加而提高。預(yù)電沉積次數(shù)越多,通過(guò)預(yù)電沉積溶解的Mg~(2+)越多,鋁鎂合金鍍層中的鎂含量越高。當(dāng)沉積時(shí)間過(guò)長(zhǎng)時(shí),不利于鍍層中鎂含量的提高。鋁鎂鍍層中的鎂含量越高,電化學(xué)阻抗越大,腐蝕電位越大,鍍層的耐腐蝕性能越好。
[Abstract]:Aim to study the optimum preparation conditions of aluminum magnesium alloy by electrodeposition with AlCl_3 and LiAlH_4 as solute and benzene and tetrahydrofuran as solvent. Methods in the AlCl3-LiAlH4- benzene-tetrahydrofuran system, magnesium was used as anode, and a certain concentration of Mg~(2 was obtained by pre-electrodeposition. By changing the parameters of current density, deposition time, pre-electrodeposition time and times of pre-electrodeposition, the effects of process parameters on the morphology, grain size and magnesium content of Al-Mg coating were investigated. The morphology, composition and content of aluminum-magnesium alloy coating were detected and analyzed by SEM and EDS. Results the main composition of the coating is Al_3Mg_2 and Alsp / 12mg / s. When the current density is 16.67mA / cm ~ 2, the surface effect of the coating is the best, and the grain size of the coating is up to 1 mm2. The more times of pre-electrodeposition, the more Mg~(2 obtained by pre-electrodeposition, the higher the content of magnesium in the coating of Al-Mg alloy, the highest is 2.93% (mass fraction). Conclusion in a certain range, the magnesium content in the coating increases with the increase of pre-electrodeposition time. The more times of pre-electrodeposition, the more Mg~(2 dissolved by pre-electrodeposition, the higher the content of magnesium in Al-Mg alloy coating. When the deposition time is too long, it is not conducive to the increase of magnesium content in the coating. The higher the content of magnesium in aluminum-magnesium coating, the greater the electrochemical impedance and corrosion potential, the better the corrosion resistance of the coating.
【作者單位】： 沈陽(yáng)大學(xué)遼寧省先進(jìn)材料制備技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：遼寧省高等學(xué)校優(yōu)秀人才支持計(jì)劃項(xiàng)目資助(LJQ2015074) 國(guó)家自然科學(xué)基金資助(51101104,51372156)~~
【分類(lèi)號(hào)】：TG174.44

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本文編號(hào)：1947335