Hull cell

The Hull cell, also known as the Hull cell test, is a method used in the electrochemical industry to evaluate metal coatings, particularly electroplating. This test method is named after its inventor, Theodore Hull, and is used to assess the uniform distribution of metal coatings on a substrate.

The Hull cell essentially consists of a transparent container in which the coated sample to be tested and a reference electrode are located. An electrochemical reaction is initiated by adding a specific electrolyte solution. During the test, users can visually monitor and assess the coating, particularly with regard to the thickness and homogeneous distribution of the coating.

This test method makes it possible to detect possible defects such as irregularities, thinning or impermeability in the coating. The Hull cell test is particularly useful for assessing the degree of copper deposition on electroplated steel sheets. This is important as a uniform and consistent coating affects the effectiveness of corrosion protection.

In the metalworking industry, the Hull cell is an important tool for quality assurance and control of electroplating processes. By using this method regularly, companies can ensure that their metal coatings meet the required quality standards and provide the best possible protection against corrosion.