Iron (III) Oxide. Great for making thermite, crap for structural/mechanical systems. Thankfully there are rust removers available that will rid you of this troublesome oxide.
In this instance, ‘HG rust remover’ was used. After a bit of research, it seems that anything with phosphoric acid works well as a rust remover.
Acetic acid (vinegar) will also work, however, it’s not as effective. Avoid stronger acids such as hydrochloric acid as this will damage the metal.
Other tools you’ll need are:
- A plastic or glass container large to soak the rusted items.
- A measuring jug or other graduated container.
- A second vessel to hold water to form a wash station.
- Brass wire brush.
- Rubber/latex gloves (VERY IMPORTANT)
Simply follow the instructions on the container; in this case – form a 1:5 dilution of the rust remover with water. Then submerge the rusted items, wait an undetermined amount of time (about 6 hours in this instance) and watch the bubbles form.
Once the solution has done the job, remove the item, wash it with clean water while scrubbing the loose rust off with the brass brush. A second treatment might be required for more stubborn and deeper patches of corrosion.
Upon completion, dry the item and treat the surface with WD40 to prevent rust from reforming!