TT-C-490E Chemical Conversion Coatings and Pretreatments for ...
TT-C-490E Chemical Conversion Coatings and Pretreatments for ...
TT-C-490E Chemical Conversion Coatings and Pretreatments for ...
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<strong>TT</strong>-C-<strong>490E</strong><br />
assure that process controls are effective <strong>and</strong> that out-of-tolerance conditions are rapidly corrected. Records,<br />
including reports of the test results, must be maintained at the phosphate application site <strong>and</strong> must be made<br />
available upon request of the acquisition activity (see 3.5.3 <strong>and</strong> 4.2.6.1).<br />
6.15 Problem alloys. Alloys such as AISI 4340 or SAE 4340 may be difficult to process. It is important<br />
that the contractor consult with the processing chemicals supplier to work out a procedure that will achieve<br />
the desired phosphatized coating with respect to coverage <strong>and</strong> coating weight.<br />
6.15.1 Type I, spray systems. Stopping of the conveyor line while parts are being processed is<br />
unacceptable. Parts subjected to a line stoppage must be reworked should they fail to meet visual<br />
acceptance criteria.<br />
Custodians: Preparing activity:<br />
Army MR Army - MR<br />
Navy – YD<br />
Air Force – 11 Project.No. MFFP-0676<br />
GSA - FSS<br />
Review activities:<br />
Army- MI, CR, AV, EA, AR, AT, MD1<br />
Navy - MC, OS, SH<br />
Air Force - 80<br />
16
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