(1. 中南大學(xué) 冶金與環(huán)境學(xué)院，長(zhǎng)沙 410083；
2. 中南大學(xué) 先進(jìn)電池材料教育部工程研究中心，長(zhǎng)沙 410083)
摘 要: 采用熔鹽化學(xué)鍍-金屬浴工藝在金屬Al表面鍍制Pb鍍層，并對(duì)復(fù)合材料的性能進(jìn)行研究。利用掃描電鏡和金相顯微鏡觀察Al/Pb復(fù)合材料的表面形貌和結(jié)合界面的金相結(jié)構(gòu)，利用萬(wàn)能材料試驗(yàn)機(jī)測(cè)試Pb鍍層與基體的結(jié)合力，并對(duì)Pb鍍層的完整性以及在5 mol/L H2SO4溶液中的耐腐蝕性和循環(huán)穩(wěn)定性進(jìn)行測(cè)試，結(jié)果表明：Pb鍍層表面平整、光滑、無(wú)孔洞，鍍層厚度均勻，且Al/Pb結(jié)合界面有明顯的過(guò)渡層，形成了冶金結(jié)合；鍍層與基體的結(jié)合強(qiáng)度均值達(dá)2.621 MPa，能夠滿(mǎn)足鉛酸電池板柵的要求；采用熔鹽化學(xué)鍍-金屬浴工藝制備的鉛鍍層的完整性、耐腐蝕性和穩(wěn)定性滿(mǎn)足鉛酸電池負(fù)極板柵的要求，Al/Pb復(fù)合材料可以作為輕質(zhì)板柵用于鉛酸電池負(fù)極。
關(guān)鍵字: Al/Pb復(fù)合材料；輕型板柵；耐腐蝕性
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. Advanced Battery Materials Engineering Research Center, Ministry of Education,
Central South University, Changsha 410083, China）
Abstract:Using molten salt electrolysis plating-metal bath process, Pb alloys were directly deposited on the surface of Al, and the properties of Al/Pb composite materials were studied. Using SEM and metallographic microscope, the surface morphology and combination interface of the Al/Pb composites materials were observed. Using universal testing machine, the combination strength between lead coating and matrix was tested. On the integrity, the corrosion resistance and cyclic stability of lead layer in 5 mol/L H2SO4 solution were tested. The results show that, the surface of lead layer is flat, smooth and non-holes, the thickness of the layer is uniform, and the interface of Al/Pb combination interface has obvious intermediate layer which indicates that a metallurgical combination is formed. The combination strength reaches 2.621 MPa, which can meet the requirements of lead acid battery. The integrity, corrosion resistance and stability of the lead coating prepared by this technology meet the grid requirements for lead-acid batteries, and Al/Pb composites can be used as a light-weight negative grid for lead-acid batteries.
Key words: Al/Pb composite material; light-weight grid; corrosion resistance
