The Preparation and Apply of Ni-W-P Alloy Coating for Electricity-Control Equipment

Abstract

The treatment technics for substrate was researched and improved by experimentations, the technics and additive research of plating for forming ornamental and functional multicomponents alloy was carried out completely, the optimum technics of plating multicomponents alloy was been found. The coatings made by optimum technics were with excellent corrosion-resistance ,wear-resistance, oxidation-resistance and with a smooth, fine, shining surface. It was proved that the 8.9% phosphorus in the coating and the coating was amorphous crystal by determinations. And it was found that the combination force between the substrate and the coating was vary good and the properties of coating to resist corrosion and abrasion were much better than that of Ni-P alloy through the tests.The coating was finery in ornamentally also.

Modeling Approaches to Permeability of Coal Based on a Variable-Order Fractional Derivative

“…Taking the data of Li as an example (Figure ), the evolution of the damage variable with the effective stress is obtained using eqs –. In stage I, the damage variable equals zero, and the permeability gradually decreases as the effective stress increases.…”

“…In order to validate the proposed VOFP model I, eq was employed to determine the effective stress and experimental data taken from Li and that from Xue et al was selected to fit eq . The fitting results are shown in Figures and , respectively.…”

“…Fitting results of VOFP model I with experimental data from Li . (a) Fitting curves of VOFP model I with experimental data from Li .…”

“…The experimental data of Li and Xue et al were selected to validate the VOFP model II. The fitting results are presented in Figures and , respectively.…”

“…Fitting results of VOFP model II with experimental data from Li (a) fitting curves of VOFP model II with experimental data from Li . (b) Variations between variable-order function and effective stress.…”