MIL-STD-1500C
5.2.4 Step Number 4.(0ptional). All parts can be dipped in a 2-4 percent by volume hydrochloric acid (HC1) solution, (60 seconds maximum at ambient temperature) followed by a cold water rinse.
5.2.5 Step Number 5. Cadmium plate in the solution listed below. Apply voltages so that the current will flow upon immersion of parts. Strike the parts at 4.3 to
5.4 amperes/sq decimeter (40 - 50 amps/sq ft {asf}) for 15 seconds, and then reduce the current to 1.6 to 3.2 amperes/sq decimeter (15 - 30 asf) until the required thickness of cadmium-titanium has been deposited.
a. Cadmium metal 18.5 - 33.5 g/l (2.5 - 4.5 oz/gal) b. Total cyanide 74 - 200 g/l (10 - 27 oz/gal) c. Sodium hydroxide 11.25 - 30 g/l (1.5 - 4 oz/gal)
d. Titanium 40 - 100 mg/l (40 - 100 ppm)
e. Sodium carbonate 0 - 60 g/l (0 - 8 oz/gal)
f. Ratio NaCn/Cd 4/1 to 6/1
g. Total permissible iron 300 mg/l (300 ppm)
h. Temperature 15 - 30°C (60 - 85°F)
WARNING
PROVIDE ADEQUATE VENILATION WHEN USING CADMIUM PLATING SOLUTIONS CONTAINING SODIUM HYDROXIDE AND SODIUM CYANIDE WEAR PROTECTIVE RUBBER GLOVES AND CHEMICAL GOGGLES TO PREVENT SKIN AND EYE EXPOSURE.
5.2.6 Step Number 6. Rinse parts in cold water.
5.2.7 Step Number 7. Rinse parts in hot water and blow dry with compressed air. Elapsed time between completion of plating and the start of baking, shall not exceed four (4) hours.
5.2.8 Step Number 8. Bake all parts heat-treated above 1.24 X 109 Pa
(180,000 psi) for 12 hours minimum at 190 ± 14°C (375 ± 25°F).
NOTE: Refer to 5.3 if post plate treatment is required. If post plate treatment is not required, refer to 5.4.
5.3 Post Plate Treatment.
5.3.1 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.
a. Type I - No post plate treatment required (see para 5.4)
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