Efficacy of reducing agent contacting pattern in Ag-SOEP electroless plating baths

Abstract

Targeting upon the efficacy of bulk and drop wise contacting mode of hydrazine reducing agent, this work addresses Ag-SOEP ELP baths for porous Ag-ceramic composite membrane preparation. The investigations involved the assessment of both membrane and plating characteristics such as conversion, efficiency, PPD, MLI, average plating rate at various values of total plating time. The experimentation inferred that bulk mode of hydrazine contacting Ag-SOEP ELP baths is the optimal choice. Further, cost comparison was also conducted to differentiate the cost of the membranes with those available commercially. It has been found that the electroless fabricated membranes are significantly inexpensive than the available commercial membranes.

Improvement of anti-corrosive and anti-oxidative properties of electroless Ni-P coating

“…Electroless deposition, compared with electrodeposition, is preferred in many industrial fields because it can produce homogeneous coatings on various substrates with a complicated shape [1][2][3][4][5]. Among of the various electroless deposition coatings such as Ni [6], Au [7], Ag [8,9], Cu [10], Cu-Sn [11], Cu-P [12] and Ni-B [13,14], electroless Ni-P coating (ENPC) and the modified one by introducing the third element or other reinforcement particles have gained broad applications because the ENPCs have many advantages such as an excellent anti-corrosive property, high hardness and good wear resistance after being annealed, high electrical and thermal conductivity, good solderability and low cost of preparing ENPCs [15][16][17][18]. However, because metal nickel in the ENPC can be oxidised in the air, the surface of the ENPC is easily covered by a thin oxide film.…”