SULFAMATE NICKEL PLATING SERVICES
Quality metal finishing to exacting industry standards
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.
SULFAMATE NICKEL PLATING TO THE FOLLOWING SPECIFICATIONS
Key aspects of sulfamate nickel plating per MIL-P-27418 and AMS 2424
The nickel plating shall have a columnar crystalline structure before annealing.
3.3.3 – Unless Otherwise specified, the plating shall be electrode posited in an all-sulfamate, chloride-free nickel bath.
3.4.1 – Plating 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.
3.4.3 – Knoop hardness of the plating after annealing shall not exceed 150 with a 500-gram load (300 Knoop before annealing).
3.2.1 – Nickel shall be plated from electrodeposition of nickel from a sulfamate solution or other suitable plating solution containing no additional agents… Except as permitted by 188.8.131.52 nickel shall be deposited directly on the basis metal without a prior flash coating of metal other than nickel.
184.108.40.206 – Allows for preliminary under plates or strikes on “difficult alloys” such as corrosion resistant stainless steel, beryllium and their alloys or other similarly passive metals.
3.4.1 – Thickness shall be as specified on the drawing.
220.127.116.11 – Where “Nickel Flash” is specified, plate thickness shall be approximately 0.0001 inch.
18.104.22.168.1 – . If internal surfaces are required to be plated to meet a thickness requirement, the drawing shall specify.
3.4.2 – Hardness shall not be higher than 300 HV100 or equivalent.
3.4.3 – Residual stress shall be within the range of 5 ksi in compression to 15 ksi in tension.
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ITEMS OF NOTE
Sulfamate nickel performs well as a standalone finish.
It is also an excellent undercoat. We can precede our sulfamate nickel plating services with an under plate 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.