[T3] Starting Again

Jim Adney jadney at vwtype3.org
Tue Aug 21 20:39:49 PDT 2018


On 21 Aug 2018 at 22:11, Jim Adney wrote:

> There is also an electrolytic way to remove rust. I'm not up on it, 
> but I could find out more. 

Okay, here's the method:

solution is 1 Tablespoon laundry soda (NOT baking soda) per gallon of 
water. Fill the tank, sealing the inlet and outlet with plastic or 
steel, no copper, brass, or stainless.  

Insert an iron or steel (no stainless, no chrome, no copper, no 
brass, no plating) electrode into the solution such that it does not 
contact the tank anywhere. A length of rebar makes a good electrode  

Connect the negative lead of your battery charger to the tank, 
positive to the electrode.

Set the charger to 12 V low current and turn it on.

Do this outside, so the oxygen and hydrogen that are liberated will 
dissipate safely. Turn the charger off and check your electrode every 
hour or so to make sure it doesn't need to be cleaned off to expose 
fresh iron. Don't let the electrode contact the tank.

You can't overdo this and damage the tank. It's self limiting; it 
only removes rust, not base iron or steel.

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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