Corrosion measuring cell
First Claim
1. A corrosion measuring cell for structural or reinforcing steel embedded in a concrete part having an exterior surface, the cell comprising:
- at least one cathode electrode embedded in the concrete part, said at least one cathode electrode being of corrosion-resistant metal;
a plurality of spaced anode electrodes of conventional steel embedded in the concrete part, said anode electrodes being spaced from said at least one cathode electrode and spaced from one another in such manner that the spaced anode electrodes are situated at varying depths from said concrete exterior surface;
at least one current measuring element, at said concrete exterior surface;
electrical connections extending from each of said at least one cathode electrode and each of said anode electrode of said current measuring element such that each of said anode electrodes is connectable through at least one of said at least one current measuring element to said cathode electrode, for detection/measurement of current due to corrosion at any one of said spaced anode electrodes.
1 Assignment
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Accused Products
Abstract
A corrosion measuring cell for establishing the start of corrosion and/or for measuring the degree of corrosion of structural or reinforcing steel, which is embedded in a concrete structural part, has a corrosion-resistant cathode electrode, and several ordinary steel anode electrodes spaced from one another at different distances from the external surface of the concrete structural part.
The anode electrodes are each connected to a cathode electrode through a current-measuring device which measures current due to corrosion at the anodes in order to establish the temporal course of carbonatization or chloridization taking place in the concrete. The connections may be switched between the measuring device and a polarizing device which polarizes the anode electrode in such a manner that the corrosion current, and thus the corrosion of the anode electrode, stops when desired to avoid damage to the concrete.
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Citations
28 Claims
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1. A corrosion measuring cell for structural or reinforcing steel embedded in a concrete part having an exterior surface, the cell comprising:
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at least one cathode electrode embedded in the concrete part, said at least one cathode electrode being of corrosion-resistant metal; a plurality of spaced anode electrodes of conventional steel embedded in the concrete part, said anode electrodes being spaced from said at least one cathode electrode and spaced from one another in such manner that the spaced anode electrodes are situated at varying depths from said concrete exterior surface; at least one current measuring element, at said concrete exterior surface; electrical connections extending from each of said at least one cathode electrode and each of said anode electrode of said current measuring element such that each of said anode electrodes is connectable through at least one of said at least one current measuring element to said cathode electrode, for detection/measurement of current due to corrosion at any one of said spaced anode electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A corrosion measuring cell for structural or reinforcing steel embedded in a concrete part having an exterior surface, the cell comprising:
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a plurality of anode electrodes of conventional steel embedded in the concrete part; at least one cathode electrode also of conventional steel, embedded in the concrete part spaced from said anode electrodes and at a substantially greater depth from the exterior surface than said anode electrodes; at least one current measuring element accessible at the concrete exterior surface, and electrical connections extending from each cathode electrode and each anode electrode to a said current measuring element, whereby each said anode electrode is connectable through said current measuring element to said cathode electrode at a greater depth, for detection/measurement of current due to corrosion occurring at each said anode electrode. - View Dependent Claims (13, 14, 15, 16)
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17. A corrosion measuring cell for monitoring the prospect of corrosion to a steel part embedded in a concrete part having an exterior surface, comprising:
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a plurality of electrodes of conventional steel embedded in the concrete part at a position between the steel part and the exterior surface; at least one current measuring element accessible at the concrete exterior surface, and electrical connections extending from the steel part and from each of said anode electrodes to a said current measuring element whereby each of said anode electrodes is connectable to the steel part through a said current measuring element, for detection/measurement of current due to corrosion occurring at said anode electrode with said steel part functioning as a cathode electrode. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A probe system for incorporation into a concrete part having an exterior surface, for monitoring the prospect of corrosion to structural or reinforcing steel embedded in the concrete part, the probe comprising:
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at least one insulating shaft; a plurality of anode electrodes of conventional steel, said anode electrodes being spaced from one another along the shaft; at least one cathode electrode of corrosion-resistant material, mounted on the shaft; at least one current measuring element; electrical connections extending from each anode electrode and from each cathode electrode to a said current measuring element whereby each anode electrode is connectable through said current measuring element to said cathode electrode, for detection/measurement of current due to corrosion at any one of said anode electrodes. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification