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EN DIN offi Foreword This standard has been prepared by Technical Committee Galvanische? Amendments This standard differs from the February edition in that: Previous editions DIN It specifies their minimum thickness and gives information on the surface finish and heat treatment of the base metals.
The standard does not cover semi-finished products and fasteners cf. Threaded articles shall be coated as agreed.
These normative references are cited at idn appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision.
For undated references, the latest edition of the publication referred to applies. In case of doubt, the German-language original should be consulted as the authoritative text.
Maximale Arbeitsplatzkonzentrationen und biologische Arbeitsstofftoleranzwerte List of threshold values for dangerous substances at workplaces and compatibility valuesTRK-Liste List of guideline values for concentrations of hazardous substance at workplaces Verordnung zum Schutz vor gef?
Designation of a tin coating on steel, with a minimum local thickness of 20?
When selecting the significant surface area, bear in mind that the shape of the article will influence the overall coating thickness. In the case of milled 5096, agreement between manufacturer and customer should be sought.
The articles to be coated shall show no material, manufacturing or surface defects which could impair the function, corrosion resistance or the appearance of the coating. In the case of milled articles, such defects include fissures, pores, foreign matter inclusions and laminations and in the case of cast articles, sink marks, cold laps, shrinkage cracks and grooves, whirls and sink marks.
Coatings shall be adherent. Until an appropriate standard is published, testing of adhesion shall be by agreement, as shall be the case when the porosity of coating is to be tested.
DIN – European Standards
Hydrogen embrittlement 5096 a particularly relevant factor when there are stress concentrations as a result of the component design or its surface finish, or because of material inhomogeneity. Hydrogen embrittlement can generally be prevented by selecting a base metal which is particularly suitable for receiving a corrosion-protective coating and by appropriate surface preparation and ddin treatment.
Heat treatment is not usually carried out because this may lead to reduced solderability. Application of a copper, bronze or nickel undercoat is recommended, while maintaining the thickness of the tin coating. If the base metal is a copper-zinc alloy, a copper, bronze or nickel undercoat with a thickness of 2?