MIL-STD-871 Electro-Chemical Stripping Of Inorganic FinishesThis standard covers the process and materials required for the stripping of inorganic finishes. Subsequent heat treating techniques needed to insure hydrogen embrittlement relief of the steel substrate are also described.

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5.6.1

Solution 1: Cyanide - Caustic

Sodium Cyanide

Initial Makeup

90 g/l   (12 oz/gal)

Control

82 - 98 g/l

(11-13 oz/gal)

Sodium Hydroxide

15 g/L    (2 oz/gal)

8 - 22 g/L

(1 - 3 oz/gal)

Temperature

Room to 11°C (Room to 160°F)

Procedure                               Ma

e parts anodic at 2 volt

s maximum

5.6.2

Solution 2: Nitric Acid

Initial Makeup

Control

Nitric Acid

Concentrated

35° - 42° Baumė

Dissolved Metal

30 g/L max

(4 oz/gal max)

Temperature

Room

Procedure

Immersion

5.6.3

Solution 3. Ammonium Nitrate

Initial Makeup

Control

Ammonium Nitrate

120 g/L

(16 oz/gal)

112 - 128 g/l

(15 - 11 oz/gal)

Dissolved Metal

30 g/L max

(4 oz/gal max)

Temperature

Room

Procedure

Immersion