Salt bath black nitrocarburizing/QPQ coatings improve the formative and functional properties of ferrous alloys. This type of coating produces a thin, uniform, hard nitride layer that results in little to no dimensional distortion or change to the material.
Benefits of QPQ coatings include:
Popular in firearm applications, GH Metal Finishing utilizes HEF USA’s proprietary Melonite® chemistries. Classified as non-toxic, Melonite® meets SAE AMS-2753C standard specifications.
GH’s architectural coatings resist dirt pickup, fading, UV degradation, and chalking. We are Houston’s only PPG-approved applicator, allowing us to extend up to a 20-year limited warranty on products using our chromate conversion pre-treatment.
Used predominately as a pretreatment prior to coating or painting of ferrous metal, Manganese Phosphate (Type M) and Zinc Phosphate (Type Z) result in added corrosion protection and increased adhesion for various spray coating systems.