MIL-DTL-13924E Class 1

Mid-temperature black oxide is a surface treatment method used for metal parts, forming a durable, black oxide layer with enhanced corrosion resistance and aesthetic appeal. Unlike conventional high-temperature blackening processes, mid-temperature black oxide operates at lower temperatures, reducing the risk of dimensional changes or material damage. This makes it particularly suitable for parts with intricate geometries or materials sensitive to higher heat, while still providing excellent protection against rust and wear.