Analysis of influencing factors of the non-chrome chemical conversion film in aluminum surface

In order to explore non-chrome aluminum conversion coating on the surface of various factors on the film properties, this study through a large number of single factor tests to determine the best material into a film former ratio and process conditions: sulfuric acid (1:2) 3.4mL/100mL, cerium sulfate 1.2g/100mL, alum 0.6g/100mL, zirconium tetrafluoride 1.5g/100mL, potassium fluoroborate 0.6g / 100mL, hydrogen peroxide (1:2) 1.5mL/100mL, temperature of 40°C, deposition time 20min. On the basis of the analysis of various influencing factors, this study have a better understanding in the various factors which play a role in the film in the process, and optimize its manufacturing process which make the film corrosion resistance, appearance and comprehensive performance are in the best situation.