Manganese Phosphate Service


Howard offers a Manganese phosphate coatings service which are heavier and courser than zinc phosphate. Manganese phosphate is ideal for service applications and for the rapid breakin of new parts. It is anti-galling and will not flake or peel off. It offers wear resistance and reduced wear during metal to metal contact. It is used to retain and enhance the performance of corrosion resistant oils and waxes.

Finish Properties

The Manganese Phosphate process provides a microcrystalline coating on ferrous metals. The coating tends to be relatively uniform, non- conductive and corrosion resistant. Manganese Phosphate is used in applications that require reduced light reflection, appearance characteristics, as a base coat for solid film lubricants and paint. Coating weight thicknesses are in the range of 1500 - 2500 mg/sq.ft. (.0002" to .0006"). Manganese Phosphate meets Military Specification MIL-DTL-16232G Type M, Classes 1, 2, 3 and 4, MIL-STD-171 and many more military, commercial, aerospace and automotive specifications.

Some Common Uses

Fasteners, firearms, pistons, retaining rings, bearings, gears, shafts, bushings, springs, magazines, slides, pins, high torque screws, nuts, and chain links.

Some of the companies Haward Corporation is approved by are, Rock Island Arsenal, Watervlite Arsenal, GEC Marconi, Martin Marietta, Northrup Grumman, GM, Breeze Industrial, General Dynamics, NAVORD, NAVSEA, Parker Hannifin, Allied Signal, Kearfott Guidance, and Kaydon.

Haward has its own on site laboratory where bath analyses are performed every four hours, precise measurements for coating weight are performed for every job. They also offer salt spray testing, hydrogen embrittlement relief, and stress relief.

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