Process for the manufacture of contact strips for electrolyzers

摘要

In the case of a process for the manufacture of contact strips, in particular for electrolyzers (membrane cells), the objective is to provide a solution that allows to create a cheap but also extremely efficient method for the manufacture of such contact strips at a high electrical efficiency. This objective is achieved by applying the roll bonding method to attach a copper strip to a titanium strip.

主权项

1. A process for the manufacture of contact strip for membrane electrolyzers consisting of nickel, copper and titanium comprising:
attaching a copper strip to a titanium strip by roll bonding process to obtain a copper-titanium contact strip for membrane electrolyzers while destroying or removing oxide layers; roll bonding a nickel strip to said copper-titanium strip to obtain a nickel-copper-titanium strip with the copper strip as an intermediate layer; and providing only a single longitudinal groove in a central part of said nickel-copper-titanium contact strip by mechanical machining to remove the central part of said contact strip to form two contact webs and exposing a titanium surface of said titanium strip, wherein the contact webs comprise nickel and copper; and wherein in a first step of said roll boding process, a cold forming rate of 60 to 80% is performed, thereby obtaining a contact strip for membrane electrolyzers consisting of nickel, copper and titanium.