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Need "clear" chem film of aluminum per MIL-C-5541 Cl 1A

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Looking for a component system to produce a colorless "clear" chemical conversion coating of aluminum which is certified to Mil-C-5541 [link is to spec at TechStreet] Cl 1A (QPL-81706), meeting specifically the requirements for corrosion resistance. There seems to be an abundance to the Cl 3, but having difficulties to finding a system to the CL 1A (If one exists)

Tim Martin
plating shop - Springfield, Massachusetts

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