MIL-DTL-16232 TYPE M
Manganese Phosphate Coating
Phosphate Conversion Coatings

Manganese Phosphating Conversion Coatings MIL-DTL-16232 Type M is an excellent coating for wear reduction and corrosion resistance when used with supplementary treatments such as oil, wax, lubricant, painting or powder coating. Manganese phosphate (mphos) MIL-DTL-16232 Type M coatings are typically much heavier than Zinc phosphate MIL-DTL-16232 Type Z coatings. Manganese phosphate coatings normally exhibit a uniform dark grey color that is durable and none light reflective.

MIL-DTL-16232 Type M phosphating is commonly used for the following types of components:

• Pistons and Bearings
• Machined parts
• Firearms and munitions
• Mortar Tubes and Gun Barrels
• Fasteners and Automotive components

Paramount Metal Finishing is the MIL Spec Specialist for both manganese phosphate as well as zinc phosphate coatings. Many of our processes have been directly approved by the US government.

Manganese phosphate and zinc phosphate conversion coatings to the MIL-STD-171 Standard, MIL-DTL-16232 Type M and Type Z Class 1, 2, & 3 as well as light zinc phosphate per TT-C-490 as pretreatment to powder coating and wet spraying.

Barrel and Rack processing on parts up to 9 feet. Abrasive blasting, stress relief and hydrogen embrittlement relief (HER) are available as well as solid film lubrication.

Plating Coverage using Internal Anodes

Electroless Plating Alternative

When electroless plating is not an option and the plating thicknesses of electrolytic coatings are of high importance on the internal surfaces of a part such as cavities/bores, cylinders or the inside of accumulators, the use of an internal anodes is the only alternative to achieve complete and uniform coverage on the interior of components.

Without the use of a supplementary electrically conductive anode you can typically expect a plating thickness ratio of 1:5 from internal to external surfaces on a cavity as small as 70mm in length. This ratio will increase if the cavity is longer, and at worst case could result in no coatings being deposited. Therefore the internal anode will alter the current distribution in electroplating and give a more uniform thickness throughout a cavity or interior surface.

Paramount Metal Finishing has decades of experience in designing the necessary tooling to maximize the properties of using of internal anodes. These fixtures will ensure a smooth, homogenous internal coating, similar in thickness, performance and appearance to that of external plating deposits.

Internal anode plating is a unique way of maximizing corrosion protection on the inside of parts, especially items of intricate designs and configurations such as pipes, tubes, chassis and cup shaped items.

Paramount Metal Finishing can accommodate internal anode plating to a wide range of complex parts with zinc plating for parts up to 11 feet in length; zinc nickel plating, bright tin plating for parts up to 9 feet long.

Smaller size projects for plating of gold, silver and indium plating can be performed as well with internal anode technology. Paramount also offers complete and uniform coverage utilizing electroless nickel plating (ASTM B733 and AMS-C-26074) for parts up to 9 feet in length.

Electrolytic Zinc plating ASTM B633, Zinc Nickel AMS 2417, ASTM B841

Painting Robots Deliver Consistent Quality

When a consistent paint thickness is of the highest importance the use of Robotic Spraying is a great option to achieve a complete and even coverage on both the exteriors and interiors configurations of a part. Complex parts can be sprayed consistently with the use of robotics. Paramount Metal Finishing has decades of experience for Robotic Paint Spraying.

Paramount Metal Finishing has the capability of Robotic wet spraying and powder coating of large production programs for the die casting industry, telecommunication, Medical and Military components. With an in-house capability of pretreatment, plating, anodizing and masking combined with our robotic spraying capability Paramount is well suited for complicated and intricate coating programs.

Paramount Metal Finishing is a specialist in high volume Robotic Paint Spraying in wet and powder and is an integrated coating applicator to ASTM, AMS and Military Specifications. We have capabilities to Plate, Anodize, Hard Coat Anodize, Sanchem, Conversion Coat, Paint, Powder Coat and Dry Film Lube in one location.

Plating, Painting, Anodizing quotation information

Plating, Anodizing, Coating and Painting processes, although sounding simple these can be complex projects with many variables. Different substrates require different processes and handling. Part designs may require the omission of plating and/or painting in certain areas adding the process of masking. Many specifications require rigorous testing and validations to confirm that certain parameters are met. Some substrates require processes that may not always be indicated on the drawing or known to a buyer. One example can be packaging requirements. The way a part is packed can have a large impact on price due to much of the finishing cost is the cost of material handling. Parts that are individually racked and wrapped are much more costly to process than parts bulk processed and bulk packed.

Paramount Metal Finishing has over 5 decades of experience in the finishing industry.  How can we ensure you get the best pricing and right process? When you require a quotation, please provide as much information as possible. Here are some suggestions that can help us get you what you need. All of these may not apply and a customer may not have all the answers, but the more information you can supply, the more accurate your quote will be. It will also add to the success of your project!

CUSTOMER INFORMATION:

• Company name and address
• Contact name and phone
• Contact email address

PART INFORMATION:

• Part Number and Revision
• Part Description(s)
• Base Material: aluminum 6061, 302 SS, Inconel, etc…
• Surface area/volume of part (if this is on the drawing it will accelerate the quote turnaround time)
• Weight of part
• Quantity of parts per release and EAU (this can help us determine the size of the program)
• What are the parts used for? (Very Important: this determines the criticality of your project)
• Material Hardness- Rockwell Hardness, Temper or Heat Treat (this determines process parameters of thermal treatments)

PROCESS INFORMATION:

• Plating/Painting Process Specification and revision (unless otherwise noted PMF will process to latest revision)
• Testing Requirements-Salt Spray, Coating weight, Abrasion testing…
• Critical Surface(s), Finish or Dimensions) on Parts.
• Are the parts for rack or barrel (bulk) process?
• Where can the parts be held during plating or painting? (thru holes, tapped holes…)
• Where are racks marks or contact marks allowed?
• Special Handling or Packaging Requirements
• Are Special Gages Required (Please Provide)
• Plating Thickness and Point(s) of measure unless defined on drawing.
• Masking Requirement, if applicable (Please provide legible blueprint, either hard copy or electronic)
• Stress Relief or Hydrogen Embrittlement (HER) bake times and temperatures unless defined by process specification)
• Oiling after process, if required
• Additional Inspection Criteria not defined in the Specification, i.e., High Temperature Bake, Testing, Visual Acceptance Criteria
• Inspection Level, i.e., 100%, AQL, Modified AQL or other.
• Tolerance Parameters- Maximum & Minimum tolerances

Paramount Metal Finishing is a specialist in high volume, cost effective finishing and is an integrated coating applicator to ASTM, AMS and Military Specifications. We have capabilities to Plate, Anodize, Hard Coat Anodize, Sanchem, Conversion Coat, Paint, Powder Coat and Dry Film Lube in one location.

37070 Black and 33446 Desert Tan

Paramount Metal Finishing continues to stay on the leading edge of finishing by introducing a new form of coating for military customers, a Chemical Agent Resistant Coating (CARC) powder coat. With the government’s approval of spec MIL-PRF 32348 Type III, Paramount is proud to become one of the few finishers to offer CARC powder coat as an option for their customers.

CARCs are optimal for military applications because of the unique set of properties they contain. Key properties of CARCs include the ability to withstand harsh chemicals of decontamination, ability to withstand extreme weather, keep a low gloss unit, and also emit the proper infrared signal.

The push for the development of a CARC powder is the result from an extensive list of advantages that powder coating has over its wet spray predecessor. With advantages in categories like cost, application, consistency, worker safety, and environmental safety, powder coating makes a great alternative when the situation allows for it.

Paramount Metal Finishing currently offers CARC powder coating in two colors; Desert Tan (FED STD #33446) and Black (FED STD #37070). We also look forward to adding Green (FED STD #34088) when made available from suppliers.

Lead by a desire for new applications and technology in finishing, PMF remains committed to stay on the leading edge of finishing.