Traditionally, weight-loss testing has been the accepted technique for determining general corrosion rates. Although this relatively simple method provides a quantitative estimate of the dissolution rate, errors can occur because of incomplete removal of corrosion products or loss of uncorroded material. Further, a large number of specimens is required to properly determine the effect of time upon corrosion rate. (Since it is recognized that time can have a significant effect upon the corrosion rate, duration of exposure to the environment should always be included when reporting corrosion rates obtained from weight-loss data.)1  For very corrosion resistant materials, this commonly used technique has the additional disadvantage of requiring extremely long exposure times in order to get adequate metal loss for meaningful corrosion rate determinations. The latter limitation frequently can be overcome by using modern techniques that predict corrosion rates from electrochemical data.

Subject
Cathodic polarization, Corrosion rate, Predicted corrosion rate, Sulfuric acid, Nickel based alloys, Chromium, Metals, Titanium, Nickel, Aluminum alloys, Titanium alloys, Corrosion potential, Hydrogen
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1970
Association for Materials Protection and Performance (AMPP)
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