1. Critical Process Parameters & Quality Impacts 1.1 Pretreatment Precision Acid Pickling Control HCl concentration (18±2%) and temperature (60±5°C) directly affect oxide removal efficiency. Inadequate cleaning causes 73% of coating adhesion failures. Quality Benchmark: Surface roughness Ra 0.8-1.2μm validated by laser profilometry Electrolytic Cleaning Current density (15A/dm²) and pH (12.8-13.2) determine organic residue levels. Over […]