Back to results
US 4,409,080 AGranted
System for monitoring a cathodically protected structure
AssigneeTexaco Inc.
InventorCarlton M. Slough
Life of this patent
Estimating the term…
Abstract
A corrosion monitoring system for measuring cathodic protection current flow. It is applicable to a buried structure that has cathodic protection applied to it. The monitoring system includes a microcoulometer connected between the buried structure and a small target electrode of a predetermined size.
Claims2
In a system having a buried structure being subject to galvanic corrosion,
- said structure being under cathodic protection comprising an anode and a DC power supply connected between said structure and said anode for counteracting said galvanic corrosion,
- means for monitoring the quantity of current flow between said anode and structure, comprising
- a microcoulometer having a precision capillary tube with two columns of mercury separated by an indicating gap of electrolyte,
- a target electrode having a predetermined relatively small surface area,
- said target electrode being buried spaced from one to fifteen feet from said buried structure, and
- a low resistance conductor connecting each of said two columns of mercury with one of said buried structure and said target electrode, respectively.
3 more elements
Dependencies are inferred from the claim text.