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CB500 Two weeks into ownership update

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Oddjob:
Muriatic acid was the exact one they were testing Roo, couldn't remember the name without looking again, it was extremely aggressive, it virtually dissolved the alloy test piece so if you've left the petrol tap on for instance it would wreck that, on steel it cleaned off the rust pretty quick but then went on to start dissolving that as well, on iron it created huge craters in the surface. After about 1 week all the Hydrochloric acid had off gassed off and it slowed right down. I would not advise using that at all after watching how it affects stuff, they used metal filings as one of the test subjects, both the vinegars dissolved them, the muriatic did as well but a lot lot quicker. Molasses and Evaporust didn't really affect them.

This is the test I watched, boring bloke but good tests except for using water, really, what did he expect.

https://www.youtube.com/watch?v=_dzlE9-9DVE

Laverdaroo:
If they were putting things in for days I'm not surprised they were pitting like that. I dip stuff for about 5 mins max or when the water has stopped reacting and fizzing like buggery. Have an inspect and if it needs another go, go again. You get to suss the times the more you do stuff. I once left a carb body in the hydrochlric over night and came in to find what resembled a carb body but made from a grey crunchy bar. I've had brilliant results runing a current through it and a bit of sacrificial steel in there as a cathode via electrolosis  but its a messy old job.

I never put any ally in now after that although some test bits Idid simply all came out black so I quickly knocjed that on the head, I always feel that ally is able to be 'nannied' back where corrosion and rust is a pig to shift physically and so justifies the aggressive approach.   I have a gallon tub of good old B&Q brick acid under the bench also which I use to soften powder coat on frame bits, swing arms that sort of thing. You can leave that for a few days and the black slime just washes off with a bit of pressure but saves hours for me. It doesnt tend to effect the ally in calipers though and just makes the black paint slide off in about 12 hours. Means I can strip, clean, scragg up and etch prime in two evenings and get it all out the way faster.
I've got that caliper from Johnny to sort and i'm on with making brackets for the horn, speedo etc etc at the min so once all done the sheets will be out and paint the lot in one hit. I'm surprised he was leaving them in there for that long though. TBH I could only watched 5mns before he started to sound a bit like my old RE teacher and I had to give it up ;D

I watched a similar one where a bloke does about 20 different ones, including coke, pepsi, alsorts. Similar results and exactly the same with the water test...............both the test samples got wet!.... ;D

Oddjob:
I think the time frame was to give time for the Molasses etc to work but also I suspect to show what just leaving parts to soak can do to them if you’re not careful

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