Rust stains on metal are divided into flash rust, ie adhering corrosion and material corrosion. Typical rusting occurs on iron railings outdoors. There is a whole range of home remedies and professional rust removers that are either applied or used as cleaning bath additives.
Age rust promotes new rust
Important is the processing and removal of rust marks on metal's thoroughness. Even the slightest residues of corroded material form the basis for renewed rust formation. When removing rust stains that have only settled on the surface, slightly acidic cleaning agents are sufficient. They are applied and wiped off after the exposure time.
If the rust or corrosion "protrudes" into the metal, the "affected" molecules must be completely removed. In addition to the intensive and long-lasting "bathing" in the appropriate cleaning solution and a mechanical removal by grinding or brushing may be necessary. If rusted foreign materials such as rust spots in the bathtub under the bath coating, the corroded surfaces may need to be exposed.
Metal substance decreases
In the case of rusted small parts such as cutlery, tool or vehicle parts, a cleaning bath helps to reduce large mechanical impact. Apart from superimposed rust, the rust must be considered as "spoiled" metal substance.
Each removal of rust costs exactly considered "healthy" material. A good example is a rusted-out car sheet, where, after a certain degree of corrosion, no sheet metal is left. For precision tools, the removal of rust can lead to functional limitations, such as scissors, the blades are no longer flush to each other.
So-called rust converters are known from the treatment of rust spots on vehicle components. They reduce material wear by partially "recovering" metal substance. In general, the special tools from the automotive maintenance industry are recommended helpers for all rust-affected metal surfaces. With stainless steel or chrome-plated surfaces, sometimes clouding occurs, which can be confused with rust. In these cases, a rust converter does not help.Tips & TricksWhen sanding or working with a copper wire brush, be sure to rid yourself of rust particles from your tool over and over again. Otherwise, you run the risk of "working in" old particles into the metal with your work.