Renaissance Metal De-Corroder consists of an amine complex of hydro-oxycarboxilic acid in an aqueous solution. It is a green liquid with a pH of approximately 4.0. Metal De-Corroder is a safe, non-toxic system for rust removal with full control. It is designed to clean iron, bronze, copper and copper alloys, brass, steel, zinc and galvanized metals. It will also effectively clean scale and rusty waste stains. Treatment selectively ruptures the bond between base metal and corrosion layer, reducing rust to a sludge which is easily wiped or brushed away. Simply rinse with clean water to stop the process. Relatively prolonged immersion over several days has no significant effect on sound metal, giving the conservator complete control of, as well as freedom from the process. The benign nature of this product eliminates work and health hazards associated with common de-rusting systems based on phosphoric acids. Gloves, masks or protective clothing are not required; however, normal ventilation and common-sense hygiene procedures should be observed. Following treatment, metal surfaces are stabilized for up to 14 days, allowing ample time for applying long term protection with products such as Renaissance Wax.