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Post by Stiggy on Mar 8, 2019 11:54:23 GMT
   Rusty bolts V old battery. TAKE CARE !!! I experimented with white vinegar, lemon juice, coke, brown sauce. The best results are from the contents of an old battery, after a 12 hour soak the rust has gone. |
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Post by carlyd on Mar 8, 2019 14:13:36 GMT
Ahh the old sulphuric acid trick.
You can buy sulphuric acid if you don't have an old battery too.
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Post by kiwicanfly on Mar 8, 2019 19:54:05 GMT
Also has the potential to impart hydrogen embrittlement into the bolts, g8.8 seem immune but g10.9 and above are succeptable. And, if you do try this at home, wear some glooves  |
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Post by Stiggy on Mar 9, 2019 8:54:19 GMT
PPE recommended.
Battery electrolyte is around 80% water when new so a diluted old battery has probably 15% sulphuric acid, not something you want to splash in your eyes (use eye protection) but strong enough to do the trick.
Probably a good idea to wear rubber gloves or at least wash your hands before eating your bacon butty.
Not a good idea to breath it in either, toxic gas is released as it attacks the rust.
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Post by casesensitive on Mar 20, 2019 11:09:44 GMT
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Post by carlyd on Mar 21, 2019 9:32:19 GMT
I made an electrolysis bath out of an old pot, a laptop charger and washing powder, probably safer! Water and Electricity probably safer?  |
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Post by kiwicanfly on Mar 21, 2019 18:10:34 GMT
Water and Electricity probably safer? Guess you've never seen the inside of an electroplating shop. Parts are submursed in tanks of liquid and current passed through, main personal protection required is against liquid splashes and fumes not electrocution. Also, and this really does go against rational thought, water is actually an insulator that will not conduct electricity if pure  I'll leave you to ponder on that one |
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Post by casesensitive on Mar 21, 2019 23:47:47 GMT
I made an electrolysis bath out of an old pot, a laptop charger and washing powder, probably safer! Water and Electricity probably safer? Rob got there first but water doesn’t conduct electricity, which is why you need the washing powder. Worked well, if pretty slowly, progress was an overnight thing rather than visible during a work day. Got a sandblaster recently, that’s going to be the way to go |
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Post by carlyd on Mar 22, 2019 11:48:38 GMT
I always learn something new here, that's why I love this place, everyday is a school day  |
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Post by kiwicanfly on Mar 22, 2019 20:37:58 GMT
Spot on carlyd in fact whilst double checking the insulation properties of pure water I discovered there is ultra pure water where you take pure water and polish it! |
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Post by carlyd on Mar 25, 2019 9:53:04 GMT
Spot on carlyd in fact whilst double checking the insulation properties of pure water I discovered there is ultra pure water where you take pure water and polish it! WTF?  |
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Post by casesensitive on Mar 25, 2019 11:08:39 GMT
Spot on carlyd in fact whilst double checking the insulation properties of pure water I discovered there is ultra pure water where you take pure water and polish it! At first, I assumed this was a 'strippy paint' thing, but what I don't know could just about fit in the Grand Canyon, so I'm biting; what? |
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I'll leave you to ponder on that one 
