The Study Of Anodization Electrolytic Coloring Technology And Performance Of Aluminum Alloys

Anodic oxidation electrolytic coloring is one of methods which are widely used in thealuminum alloy surface treatments. The electrolytic coloring technology that we are using atpresent is mostly the nickel salt, the tin salt or the nickel-tin compound salt, the color mostlyis the bronze.Therefore studying the multi-color electrolytic coloring technology of thealuminum alloy, enhancing its cosmetic, which has vital significance and pressing to promotethe aluminum alloy to be used in industrial application.Yellow electrolytic coloring is the main topic recent years, but the problem that color islight has not been solved, this article tries hard through to join the Cu salt and the chemicaladditives in the coloring fluid through metal altogether deposition, achieved deep color. Thisarticle has consulted on the massive literature foundation, first carries on the earlier theexploring experiment, determinate coloration main salt type, the chemical additive type, thecoloring voltage, the coloring time, the coloring temperature. The design used theorthogonalization design, took colors membrane roughness, the uniformity, the color as theapprasion targets, found the most anodic Oxide technology to suit coloring of the aluminumalloy, and determined the best electrolysis coloration technological conditions under thisanodic oxidation condition. Used this anodic oxidation technology to be able to form colorlesstransparent, even, the porous light synovial membrane on the aluminum alloy, afterelectrolysis coloration processing, the membrane presented yellow, the luster is artistic, whileenhanced corrosion resistance to satisfy the cosmetic request.Using the current-time curve, change in the membrane process test specimen surfacemicroscopic appearance change methods and so on observation to carry on the exploration tothe dynamics characteristic of aluminum alloy anodic oxidation membrane. Used XRD, SEM,EDS, EPMA, XRF to analyze the electrolysis coloration membrane ingredient, the appearanceand the structure.Has studied coloring performance and membrane wear—resistant, heat—resistant, lightfast. The results indicated that,Back and forth cleaned the coloring membrane surface with therubber 40 times, did not have the membrane change colors tone; heat—resistance wasgood; The coloring test sample light resistance was good, suits outdoor decoration.HCl solution soaking experiment, NaOH solution soaking experiment, 3％NaCl watersoaking experiment, the anodic polarization curve, the electrochemistry impedance spectrum and so on the different method tested corrosion—resistant of the aluminum alloy anodicoxidation coloration membrane, the test results were consistent, all indicated anodic oxidationcoloration processing enabled the aluminum alloy the corrosion resistance to improve: Notonly coloring processing has satisfied the cosmetic request, but also further enhanced thecorrosion resistance; After the sealing treatment enhanced greatly its anti-corrosionperformance and the light-fast aging performance.This article's technology is simple, pollution is small, apt to operate, color solution isstable, solution is not easily to decompose in few months,which is a kind of more idealelectrolysis yellow technology, has very vast of applied foreground.