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The guys at the yard where I have my keel stepped mast suggested applying Zinc Chromate to the base to avoid further corrosion. They said to cover the application with a paint such as Rustolium.
Hadn't heard of this before and didn't see it mentioned here. Good idea?
Picture of mast base and step below.
For aluminum, if it has been sanded and/or the anodizing has been broken in any way, I always treat it with Alodine 1201 as the first treatment. Then do the Zinc Chromate. THEN the paint of any type.
For aluminum, if it has been sanded and/or the anodizing has been broken in any way, I always treat it with Alodine 1201 as the first treatment. Then do the Zinc Chromate. THEN the paint of any type.
Greg
If there are any shops around that install or maintain fences and railings?
Those pretty anodized "bronze" aluminum railings and all eventually get painted, often with Alodine, as they age. So a local place that does railings may have it for sale, or know where you can buy it.
Did you ever find out where the "rust" on your partners was coming from?
The mast was pulled last year, and someone in the past had applied Zinc Chromate primer to the mast and mast base. Not an ounce of corrosion on either. Fantastic stuff.
BTW, you don't want Zinc Chromate. You want Zinc Chromate primer. There is a difference.
You could use a zinc chromate primer. Alternately, you can first use Alumiprep 33 after cleaning the aluminum, followed by Alodine 1201. The alumiprep removes the aluminum native oxide; the alodine then converts the fresh surface to chromate (hence conversion coating). After these steps you can use a regular primer. The alodine treatment generally provides better protection than the chromate primer, but you have to follow the directions closely and have to be careful as these products are rather harmful. The alodine system is used paint the aluminum fuselages of aircraft.
Note that a full face mask with filter is required, even just for escape : "Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter."
For working with the stuff, it requires a supplied air system!
Left over from an active career of messing with boats is a new ,unused APR respirator ...Advantage 3200 with two new 4211 filters. This is a full face seal . Any offers?
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