Thermal Spray Coating Adds an Extra Layer of Protection
Metalizing or metal spraying, also known as Thermal Spray Coating, deposits molten material on a workpiece to form a protective coating. Four types of thermal spray coating processes commonly used are flame, electric arc, detonation and plasma spraying.
Metalizing applications include:
- Corrosion protection for all types of steel structures and equipment
- Extending tube wall life of coal fired utility and chemical recovery boilers
- Condenser tube sheets and waterbox corrosion protection
- Anti-skid coatings
- Corrosion and erosion protection of carbon steel in wet steam environments
- Corrosion protection for off-shore platform supports and sheet piles
Common metal spray coating materials include:
- Bronze alloys
- Carbon steel
- Chrome steel
- Nickel chrome
Advantages of spray applied metal coatings:
- Range of temperatures – Thermal sprayed coatings can be applied at temperature ranges from 0 to 100 F.
- Consistency – Sprayed metal is consistent in quality and purity and requires no curing time.
- Withstand rough usage – Thermal sprayed coatings applied to grit blasted steel enables the structure to withstand rough usage, without sacrificing the protection.
- Prevents corroding – The sacrificial action, particularly of Zinc, prevents steel from corroding at the edges and discontinuities may occur if the coatings are mechanically applied.
- Flexibility in size and shape of work pieces – Unlike the hot dip galvanizing process, metal spraying can be applied to workpieces of any shape or size.
- Use as base or top coat – Thermal sprayed metal coatings are slightly porous which makes them an excellent base for a sealer or paint topcoat, extending the overall life of the protective coating system and provides the desired aesthetics while maintaining the plant’s color coding scheme
- Long life span – Thermal sprayed metal coatings can last up to 40 years without degradation or required maintenance, longer than polymer-based paint systems.