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Question about corrosion protection


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Hi gents

 

Like I said in the Zenith section my Ch650 has arrived and I'm about to start the build, but I'm still after a few more opinions on corrosion protection for the thing.

 

I've been told about a company called "Protec" the product is "AP-4441 Protec Etch Primer" what's everyone's opinion? Any other types people have used? BUT Like I started in the zenith forum I'd just like to rule out ANY of the to toxic/carcinogenic types please. {Not interested}

 

Cheers Boys

 

Rick

 

 

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Hi gentsLike I said in the Zenith section my Ch650 has arrived and I'm about to start the build, but I'm still after a few more opinions on corrosion protection for the thing.

 

I've been told about a company called "Protec" the product is "AP-4441 Protec Etch Primer" what's everyone's opinion? Any other types people have used? BUT Like I started in the zenith forum I'd just like to rule out ANY of the to toxic/carcinogenic types please. {Not interested}

 

Cheers Boys

 

Rick

Allan in Bendigo has "CORTEC"........non toxic , water based or thinned with metho (dries quicker)

 

 

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I was going to say Dulux etch primer .... Dulux Metalshield Etch Primer Spraypak

 

But looking at the msds it's probably a bit toxic for you....

 

Anyway, I use it on my metalwork and find it works very well.....applys easy and is long lasting and hard wearing.

 

Quite often this is the only coating I put on as I like the colour and finish. Sometimes I just clear coat straight over it.

 

Being in a pressure pack, it's handy to grab for a small bracket or whatever...

 

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Watch out for thick and cheap and nasty primers . They can add a lot of weight because it's a lot of area. Pay attention to lapped areas. That's where the hidden damage happens. I would tend to stick to recognized, proven aviation products and observe the " user care required" aspects. Just about any spray is bad for you. Nev

 

 

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I used a product called prekote to clean and prepare the 6061 alloy my Sonex is built with. I then used Wattyl etch primer over the top. It was a lot of work and the Wattyl etch primer may not have been the best product to use as its a little soft and should actually be top coated. But I felt it was a lot better for my health than using products like alodine and two pack with isoncyanates

 

 

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If the alloy you are using is 2024T3, that is much better for corrosion resistance than 6061T6, but both are OK if primed at all joining surfaces before rivetting. I used a locally bought etch primer. I didn't paint all the interior fuse of my RV, but I sprayed it with Corrosion X, which dries to a waxy film. No problems after 6 years in humid central Qld. I have since gone to epoxy primer as the other stuff was affected by mogas.

 

 

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