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Thread: Molasses rust removal
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26th Dec 2016, 04:41 PM #1
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26th Dec 2016, 04:52 PM #2Pink 10EE owner
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- Aug 2008
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Yes it works like magic. I do not think a strong brew makes any difference over a 10:1 mix.
Gold, the colour of choice for the discerning person.
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26th Dec 2016, 07:02 PM #3
Don't ask me how know, but beware of it on cast iron especially exhaust manifolds.
We were going to weld up a somewhat dodge fire engine cracked manifold when we had a rush of excrement to the brain idea to soak in a molasses mix.
The consensus was about 9:1 water to molasses mix.We forgot about it and it was left submerged some 3 weeks.
When removed the mix had eaten the carbon out of the cast iron leaving it looking like a sponge.
The remaining metal ,however was very clean.
Grahame
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26th Dec 2016, 11:24 PM #4Golden Member
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- Mar 2009
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Molasis definately works faster when the solution is warmer so summer time is better in our southerly latitudes.
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27th Dec 2016, 09:58 AM #5Member: Blue and white apron brigade
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- Perth
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If you had a lot of stuff to do agitation should also speed things up.
Something like a small (non-magnetic) pump, say from a washing machine would be the go,
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29th Dec 2016, 09:47 PM #6Golden Member
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- Canberra
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I did a heap of parts for my FJ in molasses a year ago. Did it in summer and it was fast (2 weeks) but bloody messy and stinky. Even after cleaning in hot soapy water the parts reeked for months. I wouldn't do it again. I would just knuckle down with a wire wheel on bigger beats and use electrolysis for the smaller stuff.
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1st Jan 2017, 07:45 PM #7Member
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- Dec 2014
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- Goldcoast
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I got A 20 l tube 12 m ago and did some tests ... works well on the right steel but if it has impurities it can go honey comb like Grahame mentioned ... always best to do a test first .. if you can ...
I put a sealed lid on at first to shelter from the rail ... end up popping the lid.. put some plastic with a rope which worked since it let the gasses out...
Make sur you check it every few days just to make sure there is no crap steel in the mix...
If ok gets into all of those nooks and crannies ...
Randal
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