(1. 南京農(nóng)業(yè)大學(xué) 工學(xué)院，南京 210031；
2. 南京農(nóng)業(yè)大學(xué) 江蘇省智能化農(nóng)業(yè)裝備重點(diǎn)試驗(yàn)室，南京 210031)
摘 要: 采用電沉積法在45鋼表面制得Ni-Co-P-BN(h)、Ni-Co-P-Al2O3及Ni-Co-P-BN(h)-Al2O3納米復(fù)合鍍層。利用SEM、EDS、XRD對(duì)鍍層的組織、成分及相結(jié)構(gòu)進(jìn)行了表征和分析，并利用激光共聚焦顯微鏡、光學(xué)接觸角測(cè)量?jī)x和電化學(xué)工作站分別對(duì)鍍層的表面粗糙度、潤(rùn)濕性及防腐性能進(jìn)行研究。結(jié)果表明：二元納米顆粒摻雜配比對(duì)Ni-Co-P-BN(h)-Al2O3鍍層的表面形貌、表面粗糙度及厚度均有影響。與Ni-Co-P-BN(h)和Ni-Co-P-Al2O3鍍層相比，在水滴體積為3 μL、速度為1 μL/s條件下，Ni-Co-P-BN(h)-Al2O3鍍層表面靜態(tài)接觸角為133°，鍍層表面具有更高的疏水角。電化學(xué)試驗(yàn)表明：在5%的NaCl溶液中，Ni-Co-P-BN(h)-Al2O3鍍層的最小腐蝕電流密度和腐蝕速率分別為1.0806×10-6 A/cm2和0.01308 mm/a，鍍層具有更優(yōu)的耐蝕性。鍍層中共沉積的納米BN(h)、Al2O3顆粒充分發(fā)揮二元納米粒子的優(yōu)勢(shì)，進(jìn)一步提高了二元納米復(fù)合鍍層表面的疏水性和耐蝕性。
關(guān)鍵字: 電沉積；Ni-Co-P-BN(h)-Al2O3二元納米復(fù)合鍍層；表面粗糙度；潤(rùn)濕性；耐蝕性
（1. College of Engineering, Nanjing Agricultural University, Nanjing 210031, China;
2. Key Laboratory of Intelligence Agricultural Equipment of Jiangsu Province, Nanjing Agricultural University, Nanjing 210031, China）
Abstract:Ni-Co-P-BN(h), Ni-Co-P-Al2O3 and Ni-Co-P-BN(h)-Al2O3 nanocomposite coatings were fabricated on the 45 steels substrate by electrodeposition. The organization, composition and phase structure of the coating were characterized and analyzed by SEM, EDS and XRD, respectively. And the surface roughness, wettability and corrosion resistance properties of the coatings were studied by laser scanning confocal microscope, optical contact angle measuring instrument and electrochemical workstation, respectively. The results show that the surface morphology, surface roughness and thickness of the Ni-Co-P-BN(h)-Al2O3 coatings are affected by the doping proportioning of binary nanoparticles. Compared with Ni-Co-P-BN(h) and Ni-Co-P-Al2O3 coatings, the static contact angle of the Ni-Co-P-BN(h)-Al2O3 coatings is 133° and the hydrophobic angle of the Ni-Co-P-BN(h)-Al2O3 coatings is higher when the droplet volume is 3 μL and the velocity is 1 μL/s. The electrochemical test results show that the corrosion current density of the Ni-Co-P-BN(h)-Al2O3 binary nanocomposite coatings is 1.0806×10-6 A/cm2 and the corrosion rate is 0.01308 mm/a when immersed in 5% (mass fraction) NaCl solution, which indicates that the Ni-Co-P-BN(h)-Al2O3 coatings has better corrosion resistance. The nano particles BN (h) and Al2O3 deposited in the coatings have fully utilized advantages of binary nanoparticles. The hydrophobicity and corrosion resistance of the binary nanocomposite coatings have been further improved.
Key words: electrodeposition; Ni-Co-P-BN(h)-Al2O3 binary nanocomposite coatings; surface roughness; wettability properties; corrosion resistance
