Type of Surface Change
Brown stains/discolorations or rust formation around an area that has been chafed blank.
Origin & Causes
Insufficient lubrication leads to corrosion of the metallic friction surfaces (or instrument parts) that move relative to each other (especially in locks/joints and sliding paths of, for example, punching instruments). Microabrasion occurs in such cases, which destroys the passive layer. In these sensitized places, humidity and deposits (e.g. blood residues) can easily accumulate - a process that usually leads to corrosion.
Requirements for lubricants suitable for instrument care:
Lubricant basis: e.g. liquid paraffin / white oil (paraffin oil).The lubricant used must conform to the currently valid pharmacopoeia and must be physiologically safe as specified by the German Pharmacopoeia (DAB) and Article 31 of the LMBG (German Food and Commodities Act) (or corresponding national regulations). Moreover, it must be vapor-permeable/sterilizable. "Gumming" of the joints due to an accumulative effect must be prevented.