This ASTM G184/G170 technique was developed to allow for a more detailed evaluation of the effectiveness of corrosion inhibitors under severe field conditions within a laboratory environment. The high shearing capability of the Cage is a valuable tool when used in cooperation with the Rotating Cylinder Electrode technique (RCE).

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The Rotating cage is an assembly attached to a rotator, whereby a number of corrosion coupons are mounted between two discs. The assembly may be then mounted into a low-pressure vessel for rapid screening of corrosion inhibitors or into a HPHT Autoclave for a detailed evaluation.

 

The cage is especially useful in evaluation of:

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• flow effects on corrosion (a limitation of the RCE technique)

• inhibitor effectiveness under variable shearing conditions

• rapid screening of inhibitors