94 N° 30 LUGLIO 2023 Examples of this are resistance to synthetic sweat (NF S 80-772 standard), moist heat (UNI EN ISO 4611) and the Turbula abrasion test (ISO 23160), which require galvanic coating sequences with layers of precious metal inside them. In order to comply with the standards, it is therefore possible to use thick, precious metal deposits or to resort to painting, while maintaining lower precious metal thicknesses. In both cases, the Legor company has developed galvanic cycles with reduced precious metals and optimised them so that the performance of the manufactured objects remains unaltered on the one hand, and they pass the tests on the other. An example? The creation of galvanic cycles that guaranteed a 30% saving in precious metal thickness. Finally, again with a view to the durability and corrosion resistance of the accessories, it is necessary to verify that the various metal deposits adhere correctly to each other and to the base metal with which the object is made. The verification of the correct adhesion of the coating is given by the grid test - regulated by several standards, such as ISO2819:2017 and ISO 27874:2008-, which provides a method for assessing the resistance of galvanic deposits to detachment. Thanks to continuous study and analysis, the Legor company’s R&D team is now able to provide customised galvanic cycles that guarantee maximum adhesion and consequent durability of the accessories created.
RkJQdWJsaXNoZXIy NDMxMQ==