(Hughes Missile Systems Company)
Project Number: J-95-OC-001
Completed in 1997
Joint Test Report
The objective of the HMSC JG-PP project was to identify and validate acceptable alternatives to chemical conversion coatings containing chromium. Prior to full validation testing, six nonchromate conversion coatings (Alodine 2000, Alumicoat 6787, Alumicoat 6788, CFCC, Sanchem FP, and Sol Gel), underwent screening testing. The purpose of the screening tests was to identify those coatings that passed all three of the screening tests, and then subject those materials to the qualification testing outlined in the project's Joint Test Protocol. The joint technical team agreed that if an alternative failed any of the three screening tests (Salt Spray, Wet Tape Adhesion, and Contact Electrical Resistance) on any substrate (Aluminum alloys 2024, 6061, and 7075), no further tests would be performed on that product.
Of the six coatings that were screen tested, none passed the agreed upon salt spray requirements for all three aluminum substrates. Therefore, the alternatives did not undergo any JTP qualification testing. However, it should be noted that the tested alternatives may be valuable in other applications that do not have as comprehensive or stringent requirements. The results of the screening tests are documented in this Joint Test Report.
To view the JTR for Alternatives to Chrome Conversion Coatings for Aluminum Alloys 2024, 6061, 7075, and Ion Vapor Deposition of Aluminum on Steel, dated December 4, 1997, please click here.
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Project Matrix
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