Is AMS 2700 the same as QQ p35?

Is AMS 2700 the same as QQ p35?

QQ-P-35 has been cancelled and superseded by ASTM A967 or AMS-QQ-P-35. AMS-QQ-P-35 has been cancelled and superseded by AMS 2700. Not Specified Use type appropriate for alloy, subject to purchaser acceptance.

What is a passivation process?

The passivation process is a method of improving the corrosion resistance of stainless steel parts by removing ferrous contaminants like free iron from their surface, restoring them to their original corrosion specifications.

What does stainless steel passivated mean?

Passivation is a widely-used metal finishing process to prevent corrosion. In stainless steel, the passivation process uses nitric acid or citric acid to remove free iron from the surface. The chemical treatment leads to a protective oxide layer that is less likely to chemically react with air and cause corrosion.

Can you passivate 304 stainless steel?

Stainless passivation protects stainless steel and is used to repair and restore the material surface as needed. The passivation process is compatible with grade 303, 304, and 316 alloys and is typically performed to ASTM A9367 and similar industry specifications for chemical passivation.

What are the different types of passivation in AMS 2700?

AMS 2700 covers passivation to both nitric and citric method. Method 1 – Passivation in Nitric Acid (see types below) Method 2- Passivation in Citric Acid (4-10w% Citric Acid, various temperature/time ratios are offered and additional wetting agents and inhibitors are acceptable) The following types may be specified for Method 1:

Does QQQ-P-35 cover nitric acid passivation?

QQ-P-35 does not cover citric acid passivation services. Four active nitric acid passivation services are covered as follows (four inactive methods have been withdrawn): Four testing methods to validate passivation services are provided as follows:

What is passivation of stainless steel ASTM A967?

Passivation of Stainless Steel – ASTM A967, AMS 2700 & QQ-P-35. Passivation of stainless steel is a process that removes free iron from the surface of a stainless component and at the same time promotes the formation of a thin, dense oxide protective barrier. Advanced Plating Technologies, a Milwaukee, Wisconsin company,

What is the difference between QQ-P-35 and AMS-QQ-P-35?

Most military standards that require passivation still specify QQ-P-35, even though the military “cancelled” the standard and turned it over to SAE International to maintain as AMS-QQ-P-35. The two standards, except for some format changes so it looks like other SAE standards, are identical.