Revision: D
Finish: Passivation
Company: AMS (SAE)
Application: Passivation per AMS-QQ-P-35 Method 1 – {Passivation with Nitric Acid, (Type 1, Type 2, Type 3, Type 4, Type 5, Type 6, Type 7, Type 7, Type 8) and Method 2 – Passivation with Citric Acid
Appearance: Varies
Plate Thickness: Method 1: Type 1 – 20-25% of nitric and 2-3% by weight sodium dichromate, Type 2 – 20-25% nitric and 2-3% by weight sodium dichromate, Type 3 – 20-25% nitric and 2-3% by weight sodium dichromate, Type 4 – 38-42% nitric and 2-3% by weight sodium dichromate, Type 5 – 20-25% nitric acid and 2-3% by weight sodium dichromate, Type 6 – 25-45% nitric , Type 7 – 20-25% nitric acid, Type 8 45-55% nitric acid; Method 2: 4-10% citric acid
Strike Thickness: Method 1: Type 1 – 30 mins minimum at 70-90 degrees F, Type 2 – 20 mins minimum at 120-130 degrees F, Type 3 – 10 mins minimum at 145-155 degrees F, Type 4 – 30 mins minimum at 70-120 degrees F, Type 5 – 2 mins minimum at 70-90 degrees F, Type 6 – 30 mins minimum at 70-90 degrees F, Type 7 – 20 mins minimum at 120-140 degrees F, Type 8 – 30 mins minimum at 120-130 degrees F. Method 2: Bath temperature shall be 70-160 degrees F with an immersion time of not less than 4 mins for baths operation over 140 degrees F, not less than 10 min for baths operation in the 120-140 degrees F range, not less than 20 mins for baths operation in the range of 100-119 degrees F and not less than 30 mins for baths operation below 100 degrees F.
Notes:
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