Epoxy resin glues are useful in repairing cast iron
Repairing cast iron can be challenging because there are several different types of cast iron, each with different chemical make-up. The most effective method of repairing cast iron is through a welding process that heats the metal slowly to a temperature between 600 and 1,200 degrees F, then welds the pieces together with the form of welding appropriate for the type of cast iron, and then slowly cools it. This can be expensive and time consuming. Although some have had success with "super glue," the most effective glue repairs that do not need to withstand very high heat or stress are epoxies that are made for bonding metal to metal. Does this Spark an idea?
Instructions
Steps to Gluing Cast Iron
1. Put on protective glasses and gloves.
2. Remove all rust, paint, dirt and grease. These will prevent a solid bond with the metal of each piece. Begin with wire brushing and hand scraping. Sand blasting and flame cleaning can be used for difficult areas. Acetone or lacquer thinner is best to use as a surface cleaner. Soap and water is acceptable if acetone or lacquer thinner are not available, however; make sure they are completely dry before continuing.
3. Mix equal amounts of resin and hardener on a piece of cardboard with a spreading tool to suit the project. Spread the mixture onto the ends of the pieces that are to be joined or fill in the crack needing repairing.
4. Apply slight pressure to hold the joint together for the curing time. Rubber bands, clamps or a fixture of your own making will be needed to hold the pieces in place and providing constant pressure.
5. Let the project stand for a period of 24 hours to cure. After the epoxy has cured, it can be drilled, tapped and machined like metal. It is resistant to petroleum, chemicals and acids and is waterproof. It can also withstand temperatures of up to 500 degrees F.
Tags: cast iron, cast iron, lacquer thinner, most effective, repairing cast iron