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This method is often used for fragile parts or very hard metal (carbide, titanium, hardened steel). It gives excellent results on all types of steel and INOX and is particularly suitable for logo markings. The marking is carried out by the passage of a low intensity electric current
through a stencil.
The stencil is manufactured in seconds using a label printer or a stencil. It is then placed on the piece and a stamp is applied on the whole stencil / piece. The current passes through the permeable places of the stencil and under the influence of an electrolyte, marks the piece in seconds (2 or 3
in the majority of cases). The electrolyte also has a buffer cleaning function. After marking, to stop the reaction, it may be necessary to use a neutralizer.
The marking depth is 2 to 6 microns. This method of marking does not cause mechanical deformation and has no thermal influence on the part. This marking is indelible, it is resistant to seawater, acids, solvents and light mechanical wear.
To carry out a marking, 5 elements are necessary:
1) A part to be marked in good surface condition and conductive of electric current.
2) A stencil including the marking to be made.
3) A carbon pad covered with a felt pad soaked in an electrolyte chosen according to the nature of the piece to be marked.
4) A veil to hold the felt on the pad.
4) A marking machine, generator of electric current.