TT-C-490F
Note 2: In the example shown above, if the air temperature is 70 °F and relative humidity is 65%, the dew point is 57 °F. In this example, no organic coating should be applied unless the surface temperature is 62 °F minimum.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, revision letter, amendment, and date of this specification.
b. Surface cleaning method, surface preparation process and metal class required (see 1.2). c. Whether a MSDS is required with each shipment (see 3.9/3.9.1 and 4.6).
d. If a toxicity clearance is required (see 3.10).
e. If qualification samples are required and where to send them (see 4.3 and 6.3). f. Sampling and inspection requirements.
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products which are, at the time of award of contract, qualified for inclusion in the applicable qualified products list whether or not such products have actually been so listed by that date. The attention of the supplier is called to this requirement, and manufacturers are urged to arrange to have the products they propose to offer to the Federal Government tested for qualification in order that they may be eligible to be awarded contracts or orders for the products covered by this specification. The activity responsible for the qualified products list is (ARL, ATTN: RDRL-WMM-C, Corrosion Team, Building 4600, Deer Creek Loop, Aberdeen Proving Ground, MD 21005-5066, thomas.braswell2.civ@mail.mil). An online listing of products qualified to this specification may be found in the Qualified Products Database (QPD) at https://assist.dla.mil/online/start/.
6.3.1 Retention of qualification. In order to retain qualification of a product approved for listing on the qualified products list (QPD), the manufacturer will verify by certification to the qualifying activity that the manufacturer's product complies with the requirements of this specification. Unless otherwise specified, the time of periodic verification by certification will be in two year intervals from the date of the original qualification, and will be initiated by the qualifying activity. No change will be made in formulation, raw materials or supplier(s) of raw materials, methods of manufacture, equipment, or geographic location without prior written Government approval. The Government reserves the right to
re-examine the qualified product whenever deemed necessary to determine that the product continues to meet any or all of the specification requirements.
6.3.2 Sample identification for qualification inspection. Samples for QPD testing are to be identified in a cover letter with the following information:
Manufacturer's name and product number. Submitted by (name and date).
Specify the number of samples.
Specify the reason for submitting the samples. Specification TT-C-490F; Method , Type
, Class ,
"Chemical Conversion Coatings And Pretreatments For Metallic Substrates (Base For
Organic Coatings)".
Provide a copy of the MSDS.
Provide a copy of the notarized statement of composition. Provide a copy of the technical data sheet.
Provide a copy of the test report.
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