How to clean a slightly rusty solenoid?


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Old 02-22-15, 07:46 PM
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How to clean a slightly rusty solenoid?

Hi,
not exactly sure where to post this?

Pulled a simple solenoid off of a dishwasher that is a bit rusty but still works.
Wondering if cleaning it as simple as using some rust remover, something else perhaps? Flushing with water & using compressed air to dry.

I had thought it might be in need of a little emery cloth. Would that be unwise?

thank you,
rich

Edit: hit with the Dremel wire brush seemed to do a pretty good polish job. Of course cleaning down in the magnet another story. Might give vinegar a shot.
 

Last edited by whatisit; 02-22-15 at 08:46 PM.
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Old 02-23-15, 03:55 AM
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If it's ready to fail it won't make any difference. Try it and see what happens.
 
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Old 02-23-15, 06:26 AM
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The white vinegar seems to have done a decent enough job. I soaked a couple q-tips, stuffed them down the shaft & let sit overnight.

thank you
 
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Old 02-23-15, 09:26 AM
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Emery cloth would be the end of the solenoid.

The plunger is usually chrome plated. Once the chrome is gone or pitted it's hard to repair it. Liquid rust removers can work. Anything that scratches or scores the plunger is bad. When finished cleaning you can use a silicone as lubricant but not oil. The oil will gum and hold the dust.
 
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Old 02-23-15, 09:46 AM
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The plunger is usually chrome plated. Once the chrome is gone or pitted it's hard to repair it.
Well then I'm afraid it's toast because the chrome plating is probably too damamged. Perhaps I was kidding myself when said slightly rusty.

Here's a pic after I used the Dremel wire brush to buff it. What do you think? it was working with rust on it.
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Last edited by whatisit; 02-23-15 at 10:00 AM. Reason: More Info
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Old 02-23-15, 10:25 AM
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Put a thin spray of silicone on it. You need to keep it from further rusting.
Once the plating is gone it rusts easily.

Worst comes to worst..... the solenoid and plunger are replaceable. WD21X802
 
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Old 02-23-15, 03:39 PM
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Put a thin spray of silicone on it.
Thanks for that, was afraid to coat it with anything
 
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Old 02-24-15, 05:07 AM
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After you sand off all of the rust (bringing the plunger back to its original thickness) it should work for a long time provided it does not get wet so as to cause swelling again due to more rust.
 
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Old 02-24-15, 06:25 AM
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Hopefully it won't get wet anymore. Waiting on parts to fix a Drain Shaft Seal.

Thanks
 
 

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