History :
QQ-P-35 C has been cancelled and superseded by ASTM
A967 - 99E1.

ASTM A 967 - 10el 10-Oct-2001 States that -
Regardless of which treatment is selected, the passivation effectiveness must be confirmed by one or more specified test practices to qualify for certification.

Active Standard
ASTM A 967 - 05                 ASTM A 380 - 06
Standard Practice for Cleaning, Decaling, and Passivation of Stainless Steel Parts & equipments

Active Standard ASTM A 380 - 06
Suggest precautions for cleaning, descaling and passivation for new Stainless Steel parts.
Defines passivation, contaminants and allows agreement between manufacturer and purchaser.
Spcifies attainments of cleanliness.

Method described for the detection of free iron, transparent chemicals and oily deposits are used as surface passivation and meaningful tests.

Confirmatory Test
Active Standard : A967 - 05
1.4.1   Practice A - Water Immersion Test
1.4.2   Practice B - High Humidity Test
1.4.3   Practice C - Salt Spray Test
1.4.4   Practice D - Copper Sulphate Test
1.4.5   Practice E - K - Ferricyanide - HNO_3.
1.4.6   Practice F - Free Iron Test

ASTM A967-99e1 gives the purchaser a wide choice of pre-treatments, passivation treatments, post-treatments, and testing methods. ASTM A967-99e1 PASSIVATION Federal

Specification QQ-P-35C "Passivation Treatments for Corrosion Resistant Steel" has been cancelled. This federal specification is superseded by ASTM A967-99E1.

"Standard Specification for Chemical Passivation Treatments for Stainless Parts", revised January 2000, and adopted by the Department of Defense. Under this new specification, electro- polishing is recognized as one of the methods of providing passivation without further treatment. In addition to electro - polishing, various other methods. Such as immersion in nitric or citric acid based solutions are permissible.