(1. 北京科技大學(xué) 腐蝕防護(hù)中心，北京 100083；
2. 北京表面納米技術(shù)工程研究中心，北京 100083)
摘 要: 對(duì)電沉積12.3%P(質(zhì)量分?jǐn)?shù))鎳磷合金進(jìn)行熱處理，部分晶化獲得非晶納米晶復(fù)合鍍層。利用X射線衍射儀、透射電鏡和高分辨透射電鏡分析鍍層的結(jié)構(gòu)。結(jié)果表明，鍍態(tài)時(shí)鍍層呈典型的非晶態(tài)結(jié)構(gòu)，控制熱處理工藝可得到非晶納米晶的復(fù)合鍍層。通過動(dòng)電位極化曲線(3.5%NaCl溶液)測(cè)定，得知部分晶化的鍍層耐蝕性得到改善。由于具有少量納米晶相鑲嵌于連續(xù)非晶相上，非晶納米晶復(fù)合結(jié)構(gòu)的鎳磷合金鍍層耐蝕性優(yōu)于非晶態(tài)鎳磷合金鍍層。
關(guān)鍵字: 非晶納米晶；復(fù)合鍍層；電沉積；耐蝕性
Ni-P amorphous-nanocrystalline composite coatings
（1. Corrosion and Protection Center, University of Science and Technology Beijing,
Beijing 100083, China;
2. Beijing Engineering-Research Center for Surface Nano-Technology, Beijing 100083, China）
Abstract: Amorphous-nanocrystalline composite coatings were prepared by annealing electrodeposited Ni-P alloy with 12.3%P (mass fraction). The structure of coatings is studied using X-ray diffractrometry, transmitted electron microscope and high resolution transmission electron microscope. The results show that the as-plated coating exhibits a rounded-mound topography and has an amorphous structure. Through the potentiodynamic polarization curves, the corrosion data of the coatings are obtained. The corrosion resistance of the partially crystallized coatings is improved. The corrosion resistance of partially crystallized coatings is better than that of Ni-P amorphous alloy, due to a small quantity of nanoscale crystals embedded in amorphous matrix.
Key words: amorphous-nanocrystalline; composite coating; electrodeposition; corrosion resistance
