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The Electroless Nickel For Aluminium Honeycomb Shielded Vent Windows, Ronghua Wang, Jiaqian Bu
The Electroless Nickel For Aluminium Honeycomb Shielded Vent Windows, Ronghua Wang, Jiaqian Bu
Journal of Electrochemistry
This report summarizes the electroless plating process of magnetic nickel and noncrystalline nickel for aluminium honeycomb shielded vent windows. The test results showed that the electroless nickel plating is bright in appearance, even in thickness, excellent in adhesion with aluminium substrate, good in conductivity, magnetism and corrosion resistance. Shielding efficiency obtained was 67～78 dB under 4 GHz～12 GHz frequency. Environmental reliability tests were made for 56 days under two environmental conditions, that is at 85 ℃ and 35 ℃, 95% relative humidity. The EMI shielding technical requirements of the electroless double nickel plating for aluminium honeycomb shielded vent windows of …
A Study On Performance Of Electroless Nickel Coatings Containing Low Phsphorus, Huilin Guo
A Study On Performance Of Electroless Nickel Coatings Containing Low Phsphorus, Huilin Guo
Journal of Electrochemistry
The low phosphorus coatings(LP) had superior corrosion resistence to that of high phosphorus(HP) in alkaline and neutral NaCl sulutions. The microhardness of the coatings increaed from 454 Hv to 890 Hv when they were heated at 350℃ for one hour. Two exothermic peaks were observed at 341. 6℃and 406. 2℃, which respectively corresponded to form the new phases Ni_5P_2 and Ni_3P in the differential thermal analysis. The atomic structure of as-deposited coatings in the terms of X-ray diffraction had confirmed that the coatings coasisted of extremely fine crystallites.