WHITE RUST

[VARMET]

WHITE RUST STARTING BETWEEN ALUM RADIATOR AND METAL STAND, HOW DO YOU STOP IT? NEVER HAD IT BEFORE. VARMET, WAXAHACHIE, TX

 

[goldhunter_2]

that is corrosion I do believe, happens especially quick any place on a boat you have two different metals in contact with each other

 

[COLD]

Do you guys run sacrificial anodes on your boats? The white powder is aluminum corrosion, just wondering if a good ground to each item with a common anode in the water would help? Or good enough isolation of dissimilar metals however I do know alkalinity in the coolant will conduct electricity and produce the same problem! Boat's I have so far have sacrificial anodes built in!

 

[FP1201]

It sounds like aluminum oxide (aluminum rust) Clean it with a cleaner designed for amuminum wheels, brushing/polishing/cleaning whereever possible. If there is any contact between dissimilar metals, coat them with Never-Seeze. ie: steel bolt going thru an aluminum weldment, coat the bolt where it passes thru. Believe it or not, aluminum and steel don't play nice together without some sort of barrier.

 

[Ol Yeller]

I don't know if it would help, but Alumitech told me to connect a copper wire from my aluminum radiator to the negative pole of my battery when I purchased a new radiator from them a while back. I think they said it would even help with keeping corrosion from forming inside the radiator. I also think using antisieze compound where aluminum touches steel would help the same as antisieze keeps bolts from corroding when screwed into a dissimilar metal.

 

[Sniper]

You can get some spray at motorcycle shops called hard surface prep I have been using it for years and it will stop the corrosion dead in its tracks I spray my whole engine down regular and it makes everything look new again you can ask WaterThunder how my boat looks he has commented several times how my boat looks new all the time and its going on 4 yrs old the stuff really works

 

[Root Pass]

Sniper, what is it called?

 

[bentonquick]

WHITE RUST STARTING BETWEEN ALUM RADIATOR AND METAL STAND, HOW DO YOU STOP IT? NEVER HAD IT BEFORE. VARMET, WAXAHACHIE, TX

Use neoprene washers as insulators between alum. or brass rad. and mounting bracket.

 

[dblj006]

The rubber washers are the way to go. You will have to isolate them (steel from aluminum) from each other to prevent the electrolysis(causing the white rust) to the aluminum. It will continue until it crumbles if you don't. You will need to buy a product like in an earlier post to kill the electrolysis. I recently was recommended about CORROSION-X. I gotta tell you so far it has worked really good. It was expensive though.

But fix your problem soon, quicker the better.