Back to results
US 4,058,438 AGranted
Rapid universal sensing cell
AssigneeThe United States of America as represented by the Secretary of the Army
InventorWilliam J. Russell
Life of this patent
Estimating the term…
Abstract
An electrolytic cell which comprises a standard calomel electrode supported n a container containing an etchant and a sample of the alloy or metal to be etched are electrically connected to a millivoltmeter or an X-Y recorder. The variation in potential generated by the electrolytic cell is measured as a function of time and used to determine the optimum time at which to end the process.
Claims2
A method for determining etching time for preparing a consistent metal surface for resistance welding and adhesive bonding which comprises:
- electrically coupling a standard half cell and a sample of the material to be etched to the terminals of a potentiometer;
- placing the sample to be etched in an etchant-electrolyte bath;
- placing a standard half cell in said bath;
- monitoring the potential being produced by said etchant-electrolyte bath in combination with said standard half cell and the sample being etched;
- recording the elasped time at which the potential measured by said potentiometer approaches a steady value.
2 more elements
Dependencies are inferred from the claim text.