MIL-STD-870 Cadmium Plating, Low Embrittlement, ElectrodepositonThis standard covers the process and materials required for the electro-deposition of cadmium on high strength steel substrates. Subsequent heat treating techniques needed to insure low embrittlement of steel are also described. This process is not authorized for use on steel heat treated above 1.65 X 10 9 PASCALs Pa 240,000 pounds per square inch {psi} without the approval of the applicable procuring activity.

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MIL-STD-870C

w/CHANGE 1

5.3.6 Step Number 6. Rinse parts in hot water and blow dry with compressed air. Elapsed time between completion of plating and start of baking, Step Number 7, shall not exceed four (4) hours.

5.3.7 Step Number 7. Bake all parts heat treated above 1.24 X 109Pa (180,000 psi) for 23 hours minimum, at 190.5 ± 13.9°C (375 ± 25°F).

NOTE: Refer to paragraphs 5.4.1, 5.4.2, and 5.4.3 if post plating treatment is required. If post plating treatment is not required, refer paragraph 5.5.

5.4 Post plating treatment.

5.4.1 Types of plating. Refer to applicable directives for type of plating. If the type of plating is not specified, the part shall be given the Type II treatment.

Type I No post plating treatment required (See: paragraph 5.5) Type II (See: paragraph 5.4.2)

Type III (See paragraph 5.4.3)

5.4.2 Type II.

a. Immerse in the Type II chromating solution (Iridite No. 8P or equivalent) for 15 to 30 seconds.

b. Rinse thoroughly in clean water. An additional rinse in warm water

(60°C {140°F} maximum) may be used to facilitate drying. c. See paragraph 5.5

` 5.4.3 Type III.

a. Immerse parts in Type III (reference SAE-AMS-QQ-P-416) phosphate solution for 15 to 20 seconds.

b. Rinse thoroughly in clean water. An additional rinse in warm water

(60°C {140°F} maximum) may be used to facilitate drying. c. See paragraph 5.5

5.5 Inspection. Inspection shall be in accordance with the production control inspection and tests in SAE-AMS-QQ-P-416 and this standard.

5.6 Process control. Solutions and equipment used in the plating process shall be checked periodically and maintained in accordance with the requirements of this process standard.