ASTM B117-07a Salt Spray Corrosion Resistance

Hardide's corrosion protective properties have been independently tested to compare with Hard Chrome and other coatings via salt spray tests on mild steel plates coated with Hardide, commercially sourced Hard Chrome plating and HVOF coating.

The 480-hour tests were conducted in accordance with ASTM B117-07a standard. The images below show samples of each of the three coatings after testing. The Hard Chrome plated samples were badly corroded and had to be removed from test after just 288 hours exposure. HVOF coated samples showed heavy rust stains and the coating cracked due to intensive corrosion of the steel plate beneath. The Hardide samples showed only light staining.

Unlike various paints and soft anti-corrosion coatings, Hardide offers the additional benefit of enhanced wear and erosion resistance. Hardide can also be used at temperatures of up to 400°C where organic coatings and sealants cannot.

Samples of three different coatings after salt spray corrosion tests

HVOF after 480 hours

Hard Chrome after 288 hours

Hardide Coating after 480 hours