Anodine / Alochrome The Same?

[NickDefence]

I'm looking for a manual process to protect bare aluminium against corrosion resistance.
I currently brush Alochrome onto damaged or missing plated areas but would like a ROHS compliant process, capable of meeting MIL-C-5541 Class 1A, but will exceed the following section to around 200 ºC

""6.14 (MIL-C-5541 Class 1A) Temperature effects on corrosion protection. Unpainted conversion coatings will commence losing corrosion resistance properties if exposed to temperatures of 140 ºF (60 ºC) or higher, during drying, subsequent fabrication, or service. As temperatures and exposure times increase, the corrosion protection of unpainted conversion coated parts decreases. The reduction is believed to result from the coating dehydrating and the resulting insolubility of the chromates within the coating.""

 

[israelkk]

This is a known limitation of chromate conversion per MIL-C-5541 coating which is many times overlooked by designers (most designers do not bother to read the coating spec). I have seen aerospace painted critical parts that were stored under direct sun light. The paint completely peeled off because it was painted on chromate conversion coated surfaces. The solution was to replace the conversion coating with anodize coating per MIL-A-8625 prior to painting.