DIN 17565-1968 (German Metallic Chrome)
German metallic chrome (DIN 17565-1968) is a chromium finishing process used for automotive and decorative applications. The process of applying chromium to a substrate involves an electrolytic procedure to apply a layer of chromium metal onto the desired surface. This layer of chromium provides a tough and durable finish that is resistant to wear, abrasion and chemicals, while also providing a high luster and lustrous appearance. The chromium finish is also resistant to corrosion and tarnish.
Chromium finishes are sought after for their attractive look and can be applied to a variety of substrates such as aluminum, steel and stainless steel. The DIN 17565-1968 specification defines the performance requirements for chromium plating processes, focusing on the quality and thickness of the deposited chromium layer. The chromium layer should be uniform and even in thickness and should not contain impurities or foreign material.
The process of chromium plating involves a sequence of bath chemicals, electrical currents and mechanical processes to apply the chromium layer to the substrate. The thickness of the chromium layer is determined by the bath chemicals, electrical current, voltage and time allowed for electroplating. A small amount of chromium is always deposited during the electrolytic process, and this amount is referred to as the cathodic deposition. The bath chemicals play an important role in the deposition process and can also alter the appearance of the chromium layer.
The chromium finishing process starts with a meticulous preparation of the substrate surface to ensure the chromium layer will properly adhere. This involves abrasive blasting, acid etching and alkaline cleaners. Then, the substrate is placed in the production tank with the bath chemicals and an electrical current is passed through the tank. The electric current causes reductions that allow the chromium metal to be deposited onto the substrate surface. The amount of chromium deposited is determined by the time and current allowed during the process.
Once the desired amount of chromium is deposited, the production tank is rinsed to remove any excess material. The final step involves a quality inspection to ensure the chromium layer meets the requirements of the DIN 17565-1968 specification. During this inspection, the thickness, coverage, adhesion and appearance of the chromium layer are evaluated. Once the substrate passes the inspection process, it is ready for use.
In conclusion, German metallic chrome (DIN 17565-1968) is a chromium plating process used to give substrates a resilient and attractive finish. The chromium layer is applied using an electrolytic process, which includes a series of bath chemicals and an electrical current. The chromium layer is carefully inspected for uniformity and thickness prior to use. This industrial process provides a quality finish that is resistant to wear and abrasion, and provides a high luster appearance.
