High superficial hardness for special needs
Performed under special low-temperature conditions, hard anodizing generates a layer that has a compact structure, with smaller pores when compared to usual anodizing. The hardness of the obtained layers is considerably higher than that obtained in the classical processes, being comparable to that of hard chrome, with elevated abrasion resistance. It is possible to apply greater thicknesses, resulting in hard, light-grey or black-grey layers of aluminum oxide — the color varies accordingly to the alloy. Its application is destined to technical purposes that require great superficial hardness, great wear resistance and good sliding capacity.