(東北大學(xué)有色冶金系, 沈陽(yáng) 110006)
摘 要: 運(yùn)用X射線衍射、 電子探針、 電化學(xué)測(cè)試儀和顯微 硬度計(jì)等實(shí)驗(yàn)手段， 著重研究了從酸性KCl-NaCl-AlCl3 熔鹽中電鍍得到的含錳18%～34%的光亮性Al-Mn合金鍍層的表面形貌、 相結(jié)構(gòu)等微觀結(jié) 構(gòu)以及鍍層的耐蝕性、硬 度、結(jié)合力等性能， 同時(shí)還考察了熱處理對(duì)鍍層結(jié)構(gòu)和性能的影響。 結(jié)果表明， 當(dāng)錳含量達(dá)31%時(shí)可獲單相非 晶態(tài)鍍層，單相非晶態(tài)鍍層的耐蝕性、硬度以及裝飾性等性能均優(yōu)于雙相鍍層; 與純 鋁相比, Al-Mn合金鍍層的點(diǎn)蝕電位高350～450mV, 硬度高4700～5000MPa ； 采用熱處理可提高鍍層的硬度， 但使其耐蝕性降低, 熱處理對(duì)鍍層性能的影響與鍍層本身的相結(jié)構(gòu)變化有關(guān)。
關(guān)鍵字: Al-Mn合金 鍍層 結(jié)構(gòu) 性能
（Department of Nonferrous Metallurgy, Northeastern University, Shenyang 110006, P. R. China）
Abstract:The microstructures (surface morphology, phase structure, etc) and the properties (corrosion resistance, microhardness, adhesion, etc) of bright Al-Mn alloy coatings electroplated from acidic KCl-NaClAlCl3 molten salt were mainly studied by X-ray diffraction, electronic probe, potentiostat and microhardness meter, etc. The influence of heat treatment on the structure and properties of the Al-Mn Alloy coatings were also investigated. It was shown that the Al-Mn alloy coatings with single amorphous structure can be obtained above 31%(in mass ) Mn content, and the corrosion resistance, hardness as well as decorative properties of single-phase amorphous coatings are superior to those of dual-phase coatings. Relative aluminum, a 350～450 mV increase in pitting potential and 4700～5000MPa raise in microhardness were observed in the single amorphous coatings. Heat treatment to the coatings can enhance their har dness, but can lower their corrosion resistance. The effects of heat treatment on the properties of the coatings is relative to their phase structure transition.
Key words: Al-Mn alloy coating structure property
