powder Coating

Product Description

MT-APA is an epoxy-polyester powder coating primer especially designed for direct application on substrates that are sensitive to out-gassing, such as Hot Dip Galvanized steel, Metal spraying, Zamak, Cast steel, Aluminium, brass etc. MT-APA offers excellent flow, chemical and salt spray resistance, and resistance to mechanical damage. MT-APA is suitable for use as a primer for a variety of liquid topcoats, however it is recommended that pre-qualification tests for intercoat adhesion be carried out prior to use

Powder Properties

Appearance	Smooth
Chemical type	Epoxy-Polyester
Color	Grey
Recommended Film Thickness (µm)	50 – 80 µm
Density (g/cm3)	1.68 ± 0.03 g/cm³
Application	Electrostatic
Storage	Under dry, cool (≤ 25°C) conditions
Shelf life	24 months below 25ºC

Pretreatment

For optimum coating performance the following pre-treatment is recommended prior to the application of MT-APA. The pre-treatment should be used in accordance with the supplier’s recommendations.

a) Aluminium Multistage chrome chromate or chrome phosphate

b) Galvanised Steel Multistage zinc phosphate or chromate

c) Steel Multistage zinc or iron phosphate

Application

MT-APA is suitable for corona electrostatic spraying. Tribo application is not recommended.

Recommended film thickness	50-80 µm, good protection is linked with the recommended film thickness.
Recycling	Unused powder can be reclaimed using suitable equipment and recycled through the coating system, but a minimum of 70% new powder should be used.

Note: Failure to comply with the recommended curing conditions may affect the adhesion of the topcoat and cause degradation of the system performance properties. Parts coated with MT-APA should not be handled if possible. If handling is unavoidable, clean lint-free gloves must be worn.

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