sparkie
Well-Known Member
Just thought I'd post this up here. As you may know I'm a big fan of dipping the blocks in caustic soda, to clean them up. However, although it gets rid of grease, it doesn't get rid of rust. So I thought I'd try dipping in acid. A place local to me charges £90 to caustic clean and acid dip a block, so I figured it'd be cheaper if I did it myself.
So after the obligatory jet wash, caustic dip, jet wash, caustic dip, I was left with this....
That paint isn't coming off at all!
So I thought I'd try some acid...
The tub I use is about 43 litres, but you have to take off the volume of the block- I should really work it out properly lol. So I filled with water and added this stuff..
91% sulphuric acid drain cleaner. It worked well on my outside drain!
The block started bubbling away after a few mins. I left it in for 1 hrs and noticed some rust still present. So left it for another hour...then took it out.
Rust nearly gone, but it was getting dark, so I left it out of the acid overnight, gave it a quicker wire wheel clean and another jetwash. Was greeted by this in the morning..
So it's in the acid again for another hour today.
So after the obligatory jet wash, caustic dip, jet wash, caustic dip, I was left with this....
That paint isn't coming off at all!
So I thought I'd try some acid...
The tub I use is about 43 litres, but you have to take off the volume of the block- I should really work it out properly lol. So I filled with water and added this stuff..
91% sulphuric acid drain cleaner. It worked well on my outside drain!
The block started bubbling away after a few mins. I left it in for 1 hrs and noticed some rust still present. So left it for another hour...then took it out.
Rust nearly gone, but it was getting dark, so I left it out of the acid overnight, gave it a quicker wire wheel clean and another jetwash. Was greeted by this in the morning..
So it's in the acid again for another hour today.
