I have some observations regarding the phosphoric acid eating the base metal. For high-strength steels like a Grade-8 bolt or hardened steel parts like brake adjusters I have seen the erosion you are talking about. I am always careful with those materials. I have not seen that same behavior with mild steel. I have also not seen that behavior with cast iron but I have always anticipated it due to its carbon content.
I have phosphoric acid in the block at the moment. I will drain it after a day or so and flush the block with water and/or water and baking soda before trying the Rust911.
Thanks again for the suggestion. I look forward to trying the Rust911 but now I feel obligated to read up on chelates. Freshman chemistry was a very long time ago and while the term is familiar... I don't remember what it means.
Doug L.
--Previous Message--
: ... it will eat the base metal.
: I thought Ospho was the hot stuff back
: in the 70s.
: This method takes it into another
: dimension. It eats rust, and only
: rust...
: g.
:
: --Previous Message--
: Rust removal is by far the biggest
: issue
: that I deal with. I've tried everything
: over the last 40+ years. About 2 1/2
: half years ago I tried rust911, a
: chelate (sp?) rust removal process, and
: the rust removal problem is solved, and
: I haven't looked back.
: Using the product as directed, 16-1
: mix, 24 hour soak, you will likely be
: very pleased.
: It's not acid, no special disposal
: required.
: Hint- when it gets BLACK, and no longer
: translucent, it's dead. If the water
: jackets have heavy rust, it may require
: 2 treatments.
: Glen
:
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