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WIOPEDIA - The WIOTEC® electroplating encyclopaedia


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Passivity

Passivity means that certain base metals, such as aluminum, chromium, iron, lead, cobalt, and tin, among others, behave similarly inert to noble metals under certain conditions - quite contrary to their place in the voltage series.

The passive state also makes them inert to those chemical substances with which they would otherwise react in their active form. However, passivation can increase the corrosion resistance of such metals. This can be achieved, for example, by chemical oxidizers, by anodizing aluminum, or by fuming nitric acid. Passivity comes from the formation of a thin, continuous oxide layer on the metal surface. The metal can be reactivated by boiling with hydrochloric acid or by treatment with reducing agents.

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WIOTEC® Ense GmbH & Co. KG
Auf den Geeren 9-11
59469 Ense-Höingen, Germany

WIOTEC® Arnsberg GmbH & Co. KG
Wagenbergstraße 55
59759 Arnsberg, Germany

Phone
+49 2938 97833-0
Fax
+49 2938 97833-20
E-Mail
mailwiotec

From metal to precious metal
The company WIOTEC® is your specialist for surface finishing and metalworking. In our electroplating shop, which is managed according to the latest environmental standards, we are capable of finishing both small parts and long parts of up to six meters. This makes us one of the leading and most efficient decorative surface coaters in Europe.

Our most important resource is our employees - with their commitment, competence and experience. Together with them, we work out and develop individual and tailor-made solutions for our customers. From detailed consultation and planning to purchasing, mechanical and chemical pre-treatment, professional electroplating and supplementary services - WIOTEC®'s range of services leaves nothing to be desired.

© 2023 - WIOTEC® - ALL RIGHTS RESERVED.

© 2023 - WIOTEC® - ALL RIGHTS RESERVED.


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Claudia Schäfer
+49 2938 97833-11

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