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B117 Standard Practice for Operating Salt Spray (Fog) Apparatus

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Revision Date: January 18, 2012
Updated On: January 18, 2012
Editorial Change:
This practice provides a controlled corrosive environment which has been utilized to produce relative corrosion resistance information for specimens of metals and coated metals exposed in a given test chamber.

Prediction of performance in natural environments has seldom been correlated with salt spray results when used as stand alone data.

Correlation and extrapolation of corrosion performance based on exposure to the test environment provided by this practice are not always predictable.

Correlation and extrapolation should be considered only in cases where appropriate corroborating long-term atmospheric exposures have been conducted.

The reproducibility of results in the salt spray exposure is highly dependent on the type of specimens tested and the evaluation criteria selected, as well as the control of the operating variables. In any testing program, sufficient replicates should be included to establish the variability of the results. Variability has been observed when similar specimens are tested in different fog chambers even though the testing conditions are nominally similar and within the ranges specified in this practice.

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