Corrosion & Chemical Resistant
Corrosion and chemical resistant coatings have traditionally been deposited by either welding or electroplating. Welding applications are limited due to the problem associated with the heat affected zone (HAZ) and the dilution of weld material with the substrate. Electroplating is becoming an environmental concern due the nature of its' effluent. Thermally applied coatings are rapidly becoming the preferred choice. Non-porous HVOF coatings can be applied with hardnesses in excess of 1,200 Hv which can also be superfinished. Other materials deposited by Plasma or Arc Wire can be 'sealed' to enhance their corrosion resistance.
The coatings enable the utilisation of low cost or lightweight materials without suffering poor performance or short life due to corrosive action on the surface.
Pelton Wheel After Special WC coatings lasts 200+ days
Typical Applications:
Off Shore structures - Zinc
Petrochemical - process vessels
Pumps
Typical Processes
Typical Materials
Zinc
Ni/Cr
Stainless Steels
Tantalum
Nickel
WC/Ni