QQ-P-35

Passivation Treatments for Corrosion-Resisting Steel

This specification was approved by the assistant Administrator Office of Federal Supply and Services, General Services Administration, for the use of all Federal agencies 1.1 Scope. This specification covers the different types of passivation treatments as well as recommendation, guidance and precautions for cleaning and descaling corrosion-resistant parts, components, equipment and systems. 1.2 Purpose. This specification covers the method for cleaning and descaling of stainless steel parts and outlines the final cleaning stage or passivation treatments for use on austenitic, ferritic, martensitic and precipitation hardening corrosion resistant steels. Engingeering drawings and specifications should specify classification type which should be used in accordance with 1.2.1. 1.2.1 Types. Passivation treatments shall be of the following types, as specified (see 6.2.). Type II – Medium temperature nitric acid solution with sodium dichromate additive. Superseded by

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