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Cleaning a big bronze casting


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  #1  
Old 12-21-2008, 08:40:27 PM
tharper tharper is offline
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Default Cleaning a big bronze casting

Ok,

here is one for the experts. I have a crankcase thats made out of Manganese Bronze Alloy (all 500 lbs of it)

Anyway. I want to remove 80 years of grease and grime and get it clean without turning it to mush or eating it away.

I was leaning towards the old Lye and water mix. Any experience or suggestions.

Thanks!
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Old 12-21-2008, 08:59:48 PM
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Doug Kimball Doug Kimball is offline
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Default Re: Cleaning a big bronze casting

I've used Purple Power degreaser available at Wal-Mart, VIP, etc. Don't get the concrete cleaner which is sold in a similar container. Have not used it on any 500 pound pieces but have on up to 10 pounds or so with no damage.
Whatcha working on?
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  #3  
Old 12-21-2008, 09:21:49 PM
Keith Thomas Keith Thomas is offline
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Default Re: Cleaning a big bronze casting

Doug is right on. I use it straight and put it in a plastic plant spray bottle. Spray it on, scrub it with with a brass or plastic brush or scotch bright pad and flush with water. Wear gloves if your going to get it on your hands, it will take the oil out of them too.
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Old 12-22-2008, 01:04:11 AM
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John Newman, Jr. John Newman, Jr. is offline
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Default Re: Cleaning a big bronze casting

I know a guy that filled his brand new Harbor Freight solvent tank with Purple Power and it instantly took all the paint off the inside. The stuff must work pretty good......
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Old 12-22-2008, 01:27:46 AM
Keith Thomas Keith Thomas is offline
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Default Re: Cleaning a big bronze casting

It's also great to treat the laundry when you get oil on a nice shirt tinkering with old iron while waiting for your wife to get ready to go somewhere. Not that ANY of us would ever do that.....
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Old 12-22-2008, 09:53:22 AM
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Default Re: Cleaning a big bronze casting

Hot water in the pressure washer works pretty well. Soak it with the purple stuff or simple green then blast with hot water.

keithw
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Old 10-15-2009, 08:57:13 AM
tharper tharper is offline
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Default Re: Cleaning a big bronze casting

Hello Folks,

Just an update on that big dirty bronze casting. Due to the size I couldn't dip it. I ended-up getting an industrial degreaser from Sam's Club (can't remember the brand) Anyway, several scrubbing sessions with a selection bronze brushes and copper scouring pads got it sparkling clean. A good washdown with a mild dish detergent followed. A few of the deep casting pits I had to pick out with dental tool. I loosened the gunk in the oil passages with a bronze brush from a gun cleaning kit than flushed with K1 and swabbed.

I used one of those big (cheap) plastic trays for mixing mortar etc. to catch the drippings. Before and after picks to follow!
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Old 10-17-2009, 05:34:41 PM
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Default Re: Cleaning a big bronze casting

Before and after pics. Lots and lots of work left to do.
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Old 02-23-2017, 08:30:58 PM
marathon man marathon man is offline
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Default Re: Cleaning a big bronze casting

real find wire wheel and buffer.
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Old 02-23-2017, 08:38:44 PM
marathon man marathon man is offline
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Default Re: Cleaning a big bronze casting

the motor i just finished up looked like your motor photos before.
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Old 03-29-2017, 07:33:22 PM
Inter Bloke Inter Bloke is offline
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Default Re: Cleaning a big bronze casting

Come on Guys !

You can't post such interesting Photos and not mention what they are actually of, "please" !!!
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Old 04-12-2017, 01:07:03 AM
Frank46 Frank46 is offline
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Default Re: Cleaning a big bronze casting

Good thing you posted before and after pics. That bronze came out beautiful. How far along are you till completion and running?. I know you have been working on that lombard engine for quite some time. Frank
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Old 07-25-2017, 09:57:52 PM
siouxindian siouxindian is offline
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Default Re: Cleaning a big bronze casting

man has made some cool looking stuff. being a man is good .
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Old 08-25-2017, 01:11:01 AM
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Default Re: Cleaning a big bronze casting

now that's what I call an engine
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