(1. 南昌航空大學(xué) 輕合金加工科學(xué)與技術(shù)國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室，南昌 330063；
2. 中航南京機(jī)電液壓工程研究中心，南京 211106)
摘 要: 運(yùn)用循環(huán)伏安法和X射線衍射技術(shù)研究?jī)煞N添加劑對(duì)堿性鋅酸鹽體系中鋅電沉積行為和鍍鋅層織構(gòu)的影響，探討制備(110)晶面全擇優(yōu)取向鍍鋅層的電沉積工藝條件，并用極化曲線和電化學(xué)阻抗譜研究(110)晶面全擇優(yōu)取向鍍鋅層的耐蝕性能。結(jié)果表明：添加劑A阻化鋅的電沉積，有利于鍍鋅層(110)晶面擇優(yōu)取向；添加劑B對(duì)鋅電沉積阻化作用和鍍鋅層的擇優(yōu)取向的影響不明顯；基礎(chǔ)鍍液同時(shí)加入添加劑A和添加劑B，阻化作用最大，二者的協(xié)同作用可以獲得(110)晶面全擇優(yōu)取向鍍鋅層。(110)晶面全擇優(yōu)取向鍍鋅層相對(duì)于呈隨機(jī)生長(zhǎng)的鍍鋅層自腐蝕電位正移了146 mV，腐蝕電化學(xué)阻抗值提高約7倍，鍍鋅層的結(jié)構(gòu)影響其耐蝕性能。
關(guān)鍵字: 電沉積；循環(huán)伏安；全擇優(yōu)取向；耐蝕性；電化學(xué)阻抗
（1. National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology,
Nanchang Hangkong University, Nanchang 330063, China;
2. Nanjing Engineering Center of Aircra）
Abstract:Cyclic voltammetry and X-ray diffractometry were used to study the effect of two additives on the electrodeposition behavior and texture coefficient of zinc coating, the electrodeposition conditions for the preparation of zinc deposits with fully preferred orientation were obtained, and the corrosion resistance of zinc deposits with fully preferred orientation was also investigated by polarization curve and electrochemical impedance spectroscopy. The results show that the additive A inhibits zinc electrodeposition and is advantageous to preferred orientation of (110) plane of zinc coating, the inhibition of additive B is not obvious, the effect of additive B on the preferred orientation is also not obvious, the inhibition is maximum while additives A and B are used and results in fully preferred orientation of (110) plane because of their strong synergistic effect. The corrosion potential of the zinc coating with fully preferred orientation of (110) plane shifts 146 mV, the impedance value increases about 7 times comparing with that of the zinc coating with random orientation, the structure of zinc coating influences its corrosion resistance.
Key words: electrodeposition; cyclic voltammetry; fully preferred orientation; corrosion resistance; electrochemical impedance
