It also has the drive for the valves and the ignition system mounted on this plate. The single cylinder engine has an aluminum crankcase, and mounted on the front of it is a cast iron face that carries the front crankshaft bearing. There will be absolutely NO RUST ANYWHERE on the part. Wait one day, and when you pull it out and rinse it off, you will be amazed. If you have rusty or frozen assemblies, wash any oil or grease off with acetone or MEK, so the rust is just bare rust,(Any oil or grease will prevent the Evaporust from acting, as it has to touch the rust to eat it up.) and then soak it in a container. They were amazed, and I was too when I tried it.
Then they tried it, and that is how the article resulted. They were as skeptical as I was, and dismissed most of it's claims before they used it. I tried it several years ago, after an article on in in "Skinned Knuckles" magazine. You can order it through Walmart, or it is available at Harbor Freight, but HF sells it at a 30% premium over Walmart. But after the first use, I was absolutely sold. It is stated to be completely safe for other materials such as wood and plastics, as the only thing it attacks is rust. Once the rust removal is complete, it has no further effect on the part or parts. It does not matter how long you leave the part in the Evaporust. It uses a chemical process called "Chelation" to remove rust. It does not attack anything except rust, and it removes that chemically, not by eating it away like an acid would. The lower concentration of Evapo-Rust® will take longer to remove the rust, but may have less of an effect on causing the carbon migration.No, there is no acid or base to Evapo-Rust. Second, a further dilution of the Evapo-Rust® formula may have a positive affect. Once the rust has been removed, the parts should be rinsed and dried. First, high carbon parts should not be soaked longer than necessary. There are several things that can be tried to minimize the effects of carbon migration. A quick rinsing of the metal after Evapo-Rust® has been applied may also keep the carbon from settling into the pores of the metal. With Evapo-Rust®, sometimes a wiping with a dry cloth or a more rigorous buffing can remove the dark coloring. Unlike other treatments, Evapo-Rust® will not darken products made with low carbon steel. The primary difference between Evapo-Rust® and the acid based treatments is that Evapo-Rust® will not harm or weaken the metal. Other rust removal treatments will also result in carbon migration and a darkening of the metal. Evapo-Rust®is not alone in creating the carbon migration effect. Since Evapo-Rust® is a highly effective rust remover, it stimulates the carbon migration process. It merely represents the movement of carbon from the interior of the metal to the exterior of the metal. The darkening does not have an adverse affect on the metal. This heavier layer of carbon could cause a darkening of the metal due to the attributes of the carbon. The removal of the rust (iron oxide) reduces the proportion of iron to carbon, leaving a higher concentration of carbon on the outer surface. The carbon from the steel moves, or “migrates”, to the outer layer of the metal and settles into the pores. This is a natural phenomenon that chemists refer to as “carbon migration”.
In certain instances, steel will darken in color after rust has been removed from the surface of the metal. Steel is composed of a combination of carbon and iron.
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