Mechanical testing alcohol films

Sample Preparation For reproducibility reasons, it is important to consider a proper sample preparation, otherwise the resulting corrosion effect may be different from one exposure to the next. The test sample, usually a flatshaped pure metal, is commonly prepared before exposure through some mechanical or chemical treatment, such as abrasion with SiC paper, diamond polishing, or immersion in a mild acid, followed by rinsing with demineralized water and alcohol. Immediately after surface preparation, the metal forms an oxide or oxyhydroxide upon exposure to the ambient environment that usually possesses some corrosion protective properties. The properties of the oxide or oxyhydroxide film may age with time, which may alter its corrosion protective ability. Hence, it is important also to consider the storage time prior to exposure. 

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