Effects of process on the deposition rate,corrosion resistance and corrosion potential of Ni-P-nano-TiO2(rutile) electroless composite plating,were studied by using weightless corrosion methods,magnetic thickness gaug...Effects of process on the deposition rate,corrosion resistance and corrosion potential of Ni-P-nano-TiO2(rutile) electroless composite plating,were studied by using weightless corrosion methods,magnetic thickness gauge and electrochemical methods.The results indicated that the optimum formula and process,composed of NiSO4(10g/400mL),NaH2PO2(10g/400mL),NaAc(6g/400mL),H3BO3(6g/400mL),1h,pH=5.5,80℃,100r/min and nano-TiO2 particle(rutile)(4g/400mL),were obtained.Then,it was shown that corrosion resistance of electroless composite coatings Ni-P-nano-TiO2 (rutile) increased 3-4 times,compared with that of electroless coatings Ni-Pin alkaline and salt corrosion media.However,in acid media,corrosion resistance of Ni-P coating was better.展开更多
文摘Effects of process on the deposition rate,corrosion resistance and corrosion potential of Ni-P-nano-TiO2(rutile) electroless composite plating,were studied by using weightless corrosion methods,magnetic thickness gauge and electrochemical methods.The results indicated that the optimum formula and process,composed of NiSO4(10g/400mL),NaH2PO2(10g/400mL),NaAc(6g/400mL),H3BO3(6g/400mL),1h,pH=5.5,80℃,100r/min and nano-TiO2 particle(rutile)(4g/400mL),were obtained.Then,it was shown that corrosion resistance of electroless composite coatings Ni-P-nano-TiO2 (rutile) increased 3-4 times,compared with that of electroless coatings Ni-Pin alkaline and salt corrosion media.However,in acid media,corrosion resistance of Ni-P coating was better.
