Hard anodizing (Type III) transforms aluminum into a near-ceramic material, ideal for components in extreme conditions. The dense oxide layer increases surface hardness to 60-70 Rockwell C, surpassing standard anodizing. Hydraulic pistons, firearm components, and semiconductor tools benefit from reduced friction and improved wear resistance. Unlike chrome plating, hard anodizing doesn’t contain toxic hexavalent chromium, aligning with sustainability goals. The matte gray finish can also be dyed black or other colors for branding. Partner with providers offering precision masking to protect threads or critical tolerances during processing.