Precision Quality Metal Finishing Services

Sulfamate Nickel Plating Services

Sulfamate Nickel Plating Services - Mid Atlantic Finishing Corp. - MarylandMAF’s sulfamate nickel plating services make an excellent choice for flexing or crimping applications as well as joining applications such as welding, soldering, brazing and epoxy bonding as it excels where a highly ductile, low stress nickel deposit is preferred.

Sulfamate nickel performs well as a standalone finish, but is also an excellent undercoat. We can precede our sulfamate nickel plating services with an underplate of copper plating if required.
Where duplex applications need to be considered, we can provide sulfamate nickel plating as an under plate to final nickel deposits such as bright nickel plating or electroless nickel plating. Sulfamate nickel plating also serves as an excellent underplating for tin plating, silver plating, and gold plating.

The two most common sulfamate nickel plating specifications certified by Mid-Atlantic Finishing are MIL-P-27418 and AMS 2424. Our company also can certify our sulfamate nickel plating to AMS 2403, QQ-N-290, ASTM B689 as well as most other company-specific nickel specifications.

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Sulfamate Nickel Plating Services To The Following Specifications:

A brief summary of some of the key aspects of sulfamate nickel plating per MIL-P-27418 and AMS 2424 are provided below:

Plating, Soft Nickel (Electrodeposited, Sulfamate Bath)
The nickel plating shall have a columnar crystalline structure before annealing.
3.3.3Unless Otherwise specified, the plating shall be electrodeposited in an all-sulfamate, chloride-free nickel bath.
3.4.1Plating Thickness: Unless otherwise specified, the plating shall be 0.002” +/- 0.0003” thick on all surfaces that can be touched by a ball 1/16” in diameter.
3.4.3Knoop hardness of the plating after annealing shall not exceed 150 with a 500-gram load (300 Knoop before annealing).
3.2.1Nickel shall be plated from electrodeposition of nickel from a sulfamate solution or other suitable plating solution containing no additional agents… Except as permitted by nickel shall be deposited directly on the basis metal without a prior flash coating of metal other than nickel. for preliminary underplates or strikes on “difficult alloys” such as corrosion resistant stainless steel, beryllium and their alloys or other similarly passive metals.
3.4.1Thickness shall be as specified on the drawing. “Nickel Flash” is specified, plate thickness shall be approximately 0.0001 inch. internal surfaces are required to be plated to meet a thickness requirement, the drawing shall specify.
3.4.2Hardness shall not be higher than 300 HV100 or equivalent.
3.4.3Residual stress shall be within the range of 5 ksi in compression to 15 ksi in tension.