Effect of Process Inputs on Coating Properties in the Twin-Wire Arc Zinc Process

摘要

Relationships between process inputs and coating properties were characterized using a twin-wire arc torch spraying zinc. Specifically, standoff distance, primary and secondary atomizing gas pressures, and arc current were varied in order to determine their effects on deposition efficiency, surface roughness, coating porosity, and spray particle size. Process associations were investigated using an analysis of variance with a design of experiments approach with the intent of determining which spray parameters affect each of the aforementioned coating properties. The associations found are consistent with other studies of the twin-wire arc spray process and provide a framework for selecting process operating conditions based on desired coating properties. Such a specific outline has not been previously available.