eng Oriental Scientific Publishing Company Material Science Research India 0973-3469 2011-12-10 8 2 301 307 2660 article Morphology and Corrosion Study of Electroless Ni-P Coatings on Commercial Aluminium Alloy Rajendra Kumar Duchaniya 1 Ashok Sharma 1 Manohar Totlani 2 Sushant Upadhyaya 3 Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology, Jaipur, India. Rtd. Head, Surface Engineering BARC, Mumbai, India. Department of Chemical Engineering, Malaviya National Institute of Technology, Jaipur, India.

The scanning electron microstructure, micro-hardness and conventional corrosion behavior of Electroless Nickel-Phosphorus (E-Ni-P) alloy plating on commercial aluminum substrate in an acidic bath with sodium hypo-phosphite as reducing agent were investigated. Firstly, the scanning electron microscope (SEM) was performed over the coating, the obtained structure resembled as nodular structure. Secondly, Knoop hardness test on coating implies that micro-hardness of nickel–phosphorus coating decrease as bath loading increases. Lastly, corrosion resistant of the nickel-phosphorus coating was evaluated by conventional weight loss method which indicated that the Electroless nickel-phosphorus plating improve the corrosion resistant of commercial aluminum alloy.

 https://www.materialsciencejournal.org/vol8no2/morphology-and-corrosion-study-of-electroless-ni-p-coatings-on-commercial-aluminium-alloy/ Electroless Nickel-Phosphorus Corrosion Micro-hardness