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Post by amxdreamer on Jun 23, 2020 18:09:10 GMT -8
Have you tried a basic scrape and then a pressure washer running off hot water with a sandblaster attached? Worked like a charm on my junk.
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Post by sc397 on Jun 24, 2020 3:58:45 GMT -8
I don't have a pressure washer and I am not going to sand blast a block. I am trying to make it the least amount of work as possible and it is working pretty well. So far, I have stripped 3 blocks and 4 cylinder heads in the same batch of Citric Acid solution. I waited about 24 hours before I pulled the 4th block out to scrub it down. This one came out coated with a layer of something that looked like calcium. It took a wire brush and a hose to get it off of there. I may be at the limit of the solution which now is completely black. I am going to pull it out in a while to see what it did over night. Just pulled it out. This white stuff is not easy to get off. This is the first one that has done this. I think that my Citric Acid is done. I will put the block in the Baking Soda solution to see what it does but, I think it is time to dump the Citric Acid. IMG_3461 by Rick Jones, on Flickr
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Post by stickshifter on Jun 24, 2020 4:42:53 GMT -8
Something you can try to prevent rust is spraying the block down with sodium hydroxide degreaser. They use it in the pressure washer at work, its alkaline, if you spray it direct on the wet iron it wont rust when it dries and is a pretty fair antirust agent afterwards. FYI Sodium Hydroxide (NaOH) and Potassium Hydroxide (KOH) are almost interchangeable. They are the most chemically similar of the hydroxides. They are both a white, strong alkaline, corrosive solid or powder. Sodium Hydroxide is more commonly known as lye or caustic soda where Potassium Hydroxide is known as potash.
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Post by fast401 on Jun 24, 2020 19:03:12 GMT -8
Wear goggles when you mess with caustic. We had that shit in our binder lines to flush them...nasty stuff!
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Post by 69Rebel on Jun 24, 2020 20:03:00 GMT -8
Waddya mean ya' don't have a pressure washer, Rick? Even I have one of those. :-D
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FarmGuy3
Cool Froods
I'm a FARMGUY, deal with it!
Posts: 127
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Post by FarmGuy3 on Jun 24, 2020 22:34:28 GMT -8
Waddya mean ya' don't have a pressure washer, Rick? Even I have one of those. :-D I have 2
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Post by 71sc360 on Sept 2, 2020 3:11:11 GMT -8
Hey Rick, have you ever tried oxalic acid? It comes in powder form and you mix it with hot or warm water to use as a dip solution. It's a great rust remover that doesn't aggressively attack the base metal. It's a mild acid but it still be nasty shit if you're not careful. Wear a respirator when mixing with hot or warm water so you don't breathe in the vapors. I used to use it to clean rust off old beer cans. It was strong enough to remove the rust without damaging the thin tin (provided you didn't leave them in the solution for a month). You can find it at most home stores or Amazon sells it in 40lb pails. It might be worth trying a small container to see if it would work for the engines. I kinda remember using about two tablespoons per gallon of hot water to clean 3 or 4 cans so you probably won't use too much in the solution you mix....
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