(中南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 采用金相組織分析、顯微硬度分析、質(zhì)量損失分析、電化學(xué)測試和掃描電鏡等手段研究鈰鋁黃銅和砷鋁黃銅的加工性能、組織結(jié)構(gòu)和耐蝕性能。結(jié)果表明：鈰鋁黃銅最佳熱軋溫度為700~750 ℃，該合金表現(xiàn)出良好的冷加工性能，退火組織細(xì)小均勻，700 ℃退火1 h后再結(jié)晶晶粒大小為50 μm左右。在NaCl(3.5%)溶液中腐蝕過程中，鈰鋁黃銅表面形成一層較均勻致密腐蝕產(chǎn)物膜，較好地阻止了Zn從基體表面向介質(zhì)中擴(kuò)散，在一定程度上抑制了脫鋅；鈰鋁黃銅耐腐蝕性能略優(yōu)于砷鋁黃銅，腐蝕速率為6.2×10−3 mm/a。
關(guān)鍵字: 鈰鋁黃銅；砷鋁黃銅；耐蝕性能；加工性能
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The processing abilities, structures and corrosion properties of the ceric aluminum brass and the arsenical aluminum brass were studied by means of metallographic analysis, microhardness measurement, mass loss measurement, electrochemical testing and scanning electron microscopy. The results show that the suitable hot-rolling temperature of the alloy with Ce is between 700 and 750 ℃; it has excellent cold-working capability, and the annealed structure is fine and homogeneous after annealing at 700 ℃ for 1 h; the recrystallization grains are about 50 μm. In the process of corrosion in 3.5% NaCl solution, the ceric aluminum brass forms a homogeneous and tight corrosion film on the surface, which can inhibit the diffusion of Zn from the surface of matrix to the solution, and restrain the dezincification to a certain degree. The corrosion resistance of the ceric aluminum brass is slightly better than that of the arsenical aluminum brass, the corrosion rate is 6.2×10−3 mm/a.
Key words: ceric aluminum brass; arsenical aluminum brass; corrosion properties; processing abilities
ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK
ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW