Patent ID: 9598778
Date: 2017-03-21
CPC Classifications: C23F,E04C

Claim:
1. A method of protecting steel in reinforced concrete, the method comprising the step of: applying a sequential two phase electrochemical treatment to the steel of the reinforced concrete, in which a first phase comprises application of a temporary impressed current treatment to passivate the steel and a subsequent phase comprises application of a sacrificial cathodic protection treatment; and applying a current, during the temporary impressed current treatment, which is greater than a current applied during the sacrificial cathodic protection treatment; continuously delivering the temporary impressed current treatment for a period of time prior to initiating the sacrificial cathodic protection treatment; and then, following completion of the temporary impressed current treatment, applying the sacrificial cathodic protection treatment for a period of time that exceeds the period of time that the temporary impressed current treatment is delivered.