Citric Acid Alternative to Nitric Acid Passivation

Metadata Updated: February 28, 2019

The Ground Systems Development and Operations (GSDO) Program at NASA John F. Kennedy Space Center (KSC) has the primary objective of modernizing and transforming the launch and range complex at KSC to benefit current and future NASA programs along with other emerging users. Described as the [HTML_REMOVED]launch support and infrastructure modernization program[HTML_REMOVED] in the NASA Authorization Act of 2010, the GSDO Program will develop and implement shared infrastructure and process improvements to provide more flexible, affordable, and responsive capabilities to a multi-user community. Corrosion is an extensive problem that impacts National Aeronautics and Space Administration (NASA) and[HTML_REMOVED]Department of Defense (DoD).[HTML_REMOVED] The deleterious effects of corrosion result in steep costs, asset down-time affecting mission readiness, and safety risks to personnel.[HTML_REMOVED] Consequently, it is vital to reduce corrosion costs and risks in a sustainable manner.NASA and DoD[HTML_REMOVED]have numerous structures and equipment that are fabricated from stainless steel.[HTML_REMOVED] The standard practice for protection of stainless steel is a process called passivation which removes free iron contamination from the surface and forms a[HTML_REMOVED]metal oxide layer to prevent corrosion.[HTML_REMOVED] Typical passivation procedures call for the use of nitric acid which exhibits excellent corrosion performance; however, there are a number of environmental, worker safety, and operational issues associated with its use.The longtime military specification (QQ-P-35C) for the passivation of stainless steel was cancelled in favor of newer specifications which allow for the use of citric acid in place of nitric acid.[HTML_REMOVED] Citric acid offers a variety of benefits that include increased safety for personnel, reduced environmental impact, and reduced operational cost.[HTML_REMOVED] There have been few studies, however, to determine whether citric acid is an acceptable alternative for NASA and DoD applications; therefore, NASA and DoD[HTML_REMOVED]agreed to collaborate on an effort to validate citric acid as an acceptable passivating agent for stainless steel.[HTML_REMOVED]

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_11711
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 9b3fcf8b-8d0d-4435-8bbb-a51e50bb8fc2
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2016-09-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 827b6560771718cb9765580f29247dfbfb2271b4
Source Schema Version 1.1

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