PENGARUH VARIASI LAMA WAKTU ANODIZING MENGGUNAKAN PEWARNA KUNYIT TERHADAP HASIL KECERAHAN WARNA, KETEBALAN LAPISAN OKSIDA, STRUKTUR PERMUKAAN, KEKASARAN DAN LAJU KEAUSAN PADA ALUMINIUM
Abstract
Anodizing is used to make aluminum to be corrosion-resistant, making the display more attractive and enhancing robustness. But most anodizing always use chemical dyes that can pollute the environment. The purpose of this research is to enforce the various anodizing time for color, coating thickness, structure, roughness and wear rate on aluminum by using turmeric dyes which will be used as alternative materials as alternative dyes
Aluminum plates are cut to the size of 50mm x 30mm x 1.5mm respectively then use sandpaper using P240, P400, P800 and P1500 series sandpaper in sequence. Stages of anodizing process include cleaning, etching, anodizing, dyeing, sealing and rinsing at each stage. The time variation used in the anodizing process is 10, 25, 40 minutes, with 2 Ampere current and 12 volt voltage by dyeing process using turmeric powder dye. Tests conducted are color brightness (RGB), roughness, oxide layer thickness, surface structure, and wear rate.
The results of the test showed the highest value of color composition (RGB) obtained from minute 40 as much as R 209.3%, G 61.3%, B 5.3%, the highest surface roughness value obtained at minute 40 equal to Ra 2.00 (μm), the average value of the highest oxide layer thickness is obtained from 40 min 62,5 m, the highest average value of the wear in the 10th minute which is 38.25. 10-10 cm2/kg. From the results of the macro photo at minute 10 shows the pores formed small and homogeneous, as the more pores formed the more and more it is larger.