Environmental Corrosion and Corrosion Under Insulation (CUI) Protection
High Velocity Arc Spray (HVAS)
High Velocity Arc Spray (HVAS) also referred to as metallization or cold thermal spray – is a process that uses an electric arc to melt a pair of metallic wires. This molten material is atomized by a cone of compressed air and propelled towards the surface profiled work piece. On contact with the surface, the molten spray solidifies on the surface to form a dense, strongly adherent coating.
Outstanding protection with Whertec: HVAS is an ideal choice for the external protection of pressure vessels operating in coastal environments, or when insulation is used to protect the vessel. Whertec’s HVAS technology provides outstanding protection against corrosion under insulation (CUI) environments!
Unlike traditional HVAS process, HVHD uses high velocity and multiple coating layers to achieve a higher mechanical bond strength to the surface,reducing the surface porosity commonly found with HVAS systems. This higher coating density is ideal for applications when corrosion resistance and barrier protection is necessary.
Optimize with Whertec: Through Whertec’s HVHD process, specialty alloy materials may be sprayed including Inconel, Hastelloy and a variety of engineering alloy technologies to optimize the film property.
Whertec’s HVHD technology has been a proven successful in immersion service above 356 °F (180 °C) – a temperature that exceeds a suitable range for any ceramic polymer-based lining.
The HVHD technology provides long-term corrosion protection in pressure vessel service exposed to rich hydrogen sulfide, high temperature, and exposure to steam-out conditions.