Corrosion probe for use in measuring corrosion rate under specified heat transfer conditions

Claim 1

An assembly for measuring corrosion rate under specified heat transfer conditions, said assembly comprising: corrosion probe housing means for insertion into a conduit through which corrodant fluid flows, a plurality of corrosion rate meter electrodes located on said housing means for exposure to said corrodant fluid, said electrodes comprising a reference electrode, an auxiliary electrode, and a first hollow test electrode, said test electrode containing heat transfer fluid with a heat transfer coefficient similar to that of the test electrode, electrical heating means located within said first hollow test electrode for heating an inside wall surface thereof, said heating means having an electrical input and being at least partially submersed in said heat transfer fluid, first temperature sensing means located inside said first hollow test electrode between said heating means and said inside wall surface, said first temperature sensing means being submersed in said heat transfer fluid for sensing the temperature of said fluid, second temperature sensing means for sensing the temperature of the corrodant fluid adjacent an outside wall surface of the test electrode, corrosion rate meter means conductively connected to said reference, auxiliary and first test electrodes for instantaneously measuring the corrosion rate of said first test electrode, and heat transfer coefficient meter means conductively connected to said electrical heating means input and said first and second temperature sensing means for instantaneously measuring the heat transfer coefficient across a wall of said first test electrode.