In this 2nd installment to the three part series on how to clean metals I will discuss the proper way to clean cast iron before using our product, Castaloy. Castaloy is a cast iron repair rod used to fix cast iron without all the work and money required by other forms of repair such as brazing, welding or epoxy.
In most cases, cast iron will need a bit more attention than aluminum or steel. It is very susceptible to corrosion and oxidation so cleaning and using of our flux product is highly recommended. As with Alumaloy, make sure the area you are working with is thoroughly wiped down and is free of contaminants. This is of vital importance, as any contamination can cause poor wetting. Remember cast iron is porous and can absorb liquids so you will want to make absolutely sure the area to be mended is dry and free of flammable cleaners used to remove paint or oil. **THIS IS VERY IMPORTANT!! We recommend vigorous scrubbing with a wire brush or wheel. We provide an acid/cleaner with your purchase of more than 4 rods or you can purchase the acid/cleaner separately. This substance is to be used last and is the final step in your cleaning preparation. If you have chosen to go the extra step to help prevent future corrosion and to ensure a stronger bond, this is the time that you would apply a few drops of flux to the area being repaired. As always, flux is suggested but not required.
We hope these cleaning guidelines have been helpful to you in the use of our products. If you have questions or comments please feel free to visit our cast iron repair forum or post your comments directory to this article. Feedback always helps us to serve our customers better.