本文關(guān)鍵詞：鎂合金化學(xué)鍍中預(yù)處理氟化鎂膜的特征與作用，由筆耕文化傳播整理發(fā)布。

第 17 卷第 5 期 中國有色金屬學(xué)報(bào) 2007年 5 月 Vol.17 No.5The Chinese Journal of Nonferrous Metals May 2007 文章編號(hào):1004-0609200705-0789-06 鎂合金化學(xué)鍍中預(yù)處理氟化鎂膜的特征與作用 國 棟,樊占 國,楊中 東, 趙 林,高 鵬 東北大學(xué) 材料與冶金學(xué)院,沈陽 110004 摘 要:對(duì)鎂合金的表面前處理工藝進(jìn)行研究,探討氟化鎂在化學(xué)鍍層中的存在形式及作用。結(jié)果表明:酸浸使 鎂合金表面形成一層氧化物膜;活化過程生成的氟化鎂不具備反應(yīng)活性,對(duì)鎂合金基體有保護(hù)作用,使之免于受 鍍液的過度腐蝕;對(duì)化學(xué)鍍層斷口進(jìn)行 SEM元素分布分析顯示氟化鎂層集中存在于鎂合金基體與 Ni-P鍍層之間; 但過度活化會(huì)導(dǎo)致化學(xué)鍍層孔隙率升高,以 3.5%NaCl 溶液為介質(zhì)的動(dòng)電位極化測(cè)試表明,過度活化會(huì)導(dǎo)致化學(xué) 鍍層耐蝕性下降。 關(guān)鍵詞:鎂合金;化學(xué)鍍;耐蝕性;氟化鎂 中圖分類號(hào):TG 174.4 文獻(xiàn)標(biāo)識(shí)碼:A Effects and characteristics of MgF during electroless nickel plating 2 of magnesium alloys GUO Dong, FAN Zhan-guo, YANG Zhong-dong, ZHAO Lin, GAO Peng School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China Abstract: Pretreatment of magnesium alloy surface was studied. Effects of MgF in Ni-P coatings were emphatically 2 discussed. The results show that a magnesium oxide layer is formed after acid etching, and the potential differences of different phases of magnesium alloys are reduced due to the presence of oxide layer. MgF layer is formed after activation 2 which can protect magnesium substrate from corrosion of plating bath. The elemental distribution of cross section of Ni-P coating was investigated by scanning electron microscopy. The MgF layer exists between the magnesium alloy substrate 2 and the Ni-P coating. Excessive activation can raise the porosity of Ni-P coating, and the potentiodynamic polarization indicates that excessive activation

  本文關(guān)鍵詞：鎂合金化學(xué)鍍中預(yù)處理氟化鎂膜的特征與作用，由筆耕文化傳播整理發(fā)布。