TT-C-490F
w/AMENDMENT 4
20 July 2018
SUPERSEDING
TT-C-490F
w/INT. AMENDMENT 3
29 February 2016
w/AMENDMENT 2
24 September 2015
FEDERAL SPECIFICATION
CHEMICAL CONVERSION COATINGS AND PRETREATMENTS
FOR METALLIC SUBSTRATES (BASE FOR ORGANIC COATINGS)
The General Services Administration has authorized the use of this federal specification by all
federal agencies.
1. SCOPE AND CLASSIFICATION
1.1 Scope. This specification covers processes, pretreatments, and pre-primer surface
preparations of metallic substrates for coating applicators. It covers metal surface preparation for
delaying corrosion initiation and promoting primer adhesion. In addition, this specification
covers the testing requirements for qualification of conversion coatings, the pretreatments and
pre-primer coatings. Additional qualification requirements may be required based on each
specific application.
1.2 Classification. This specification covers the following cleaning methods, surface preparation
processes, and substrate classes (see 6.2).
AMSC N/A AREA MFFP
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that
may improve this document should be sent to: Director, U.S. Army Research Laboratory, Weapons
and Materials Research Directorate, Specifications and Standards Office, ATTN: RDRL-WMM-C,
Aberdeen Proving Ground, MD 21005-5069 or emailed to
brian.e.placzankis.civ@mail.mil. Since
contact information can change, you may want to verify the currency of this address information
using the ASSIST Online database at
https://assist.dla.mil/.
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