Most Olympic weight bars required some form of protective coating or treatment, such as chrome, black oxide or zinc, to help guard corrosion from harmful perspiration and humidity. Perspiration is the leading cause of rust for weightlifting bars. Keeping bars wiped down and clean is the best step to protect your Olympic bar investment.
For those looking for the best protection offered in weightlifting bars, stainless steel comes into play. Stainless steel bars do no use any type of coating or treatment for protection against rust. They are made with corrosion-resistant stainless steel.
Stainless steel gives you the fitness industry's highest level of bar protection, but don't let that fool you. Perspiration can eat through the space shuttle if given enough time. However, if these bars are kept wiped down and clean they will outlast any other types of bars available. Plus, when placed in home gym settings, any issues related to rust and corrosion will be almost non-existent when kept clean.