Powder coating primer containing zinc MT-PZ ALZ44TH

Product details

Product Description

MT-PZ is a powder coating primer containing zinc which is designed to give enhanced corrosion protection of mild steel. This duplex system combines cathodic protection and barrier effect. Dedicated to steel protection with a surface pre-treatment obtained by grit/shot. MT-PZ is based on a specific epoxy zinc rich formulation that brings conductivity to enable the cathodic protection. MT-PZ includes a specific anticorrosive function which improves the protection in case of scratch.

Powder Properties

Chemical type	Thermosetting epoxy
Appearance	Smooth
Color	Grey
Recommended Film Thickness (µm)	70 – 120 µm
Density (g/cm3)	2.9 ± 0.03 g/cm³
Application	Electrostatic
Storage	Under dry, cool (≤ 30°C) conditions
Shelf life	At least 12 months from production date

Pretreatment

Surface preparation depends upon the metal, the type of surface, its conditions and the required performance. See our recommendation for pretreatment to be used with MT- PZ.

Substrate	Mechanical pretreatment	Chemical pretreatment
Mild steel	Grit Blasting Sa 2.5 in accordance with ISO NF EN 8501-1. Roughness: Rz 35 60 µm / Ra 6-12 µm	Banned
Cast steel
Electro Zinc steel	Banned
Hot dip galvanized steel
Zinc sprayed (gas flame/electrical deposition)

Application

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

Application settings	Fluidizing air pressure: 1.5kg/cm2 initially then 1kg/cm2 Transport air pressure: 0.5 to 0.8 kg/cm Recommended voltage: 65 to 70kV
Curing limits	Primer should be cured, or at least gelled, using the recommended curing schedules, before application of the topcoat. The object temperature must not be below 110°C or above 180°C. The primer should be cured in a convection oven, optionally with infra-red heaters, with air temperature not exceeding 180°C.
Recommended film thickness	70-120 µm A good protection is linked with the recommended film thickness.
Recycling	Trials, with suitable recycling equipment, must be carried out before commencing production. Attention should be paid to the ratio of new powder, a minimum of 70% must be used. Gun nozzles must be cleaned every 30 minutes.

PRODUCT

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