Corrosion Behavior Diagram Purpose
The Corrosion Behavior Diagram (CBD) technique is used to examine the overall corrosion behavior of a system. It is a complex technique that acquires data during three sweeps of the potential. The advantage of the CBD over other techniques is its generality. It works both with spontaneously passive systems that are difficult to study otherwise as well as with more traditional systems.
For details on the CBD method and examples of its use, consult Siebert, “Application of the Rapid Scan Potentiodynamic Polarization Technique for Corrosion Studies,” in Electrochemical Techniques for Corrosion Engineering, R. Baboian, ed., NACE, Houston, Texas, 1986 and references therein.
The graphical output of the experiment is a plot of log(current) versus potential. The data from three scans are shown on one graph. Analysis of the curve can often yield the following types of information:
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