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Microstructural Evaluation in an Instant

In the years prior to the introduction of diamond abrasives and semi-automatic and fully automatic polishing devices, mechanical polishing was a more tedious process that was truly dependent on the skill of the person doing the preparation. Attaining high-quality mechanically polished surfaces routinely was difficult even for the most competent metallographers. The possibility of replacing at least the polishing stages of specimen preparation by a relatively simple electrolytic treatment, which appeared to be capable of producing quality surfaces with good reproducibility, was highly attractive. When microstructural characteristics need to be observed rapidly on a wide range of materials, there is no substitute for electrolytic polishing. It is a tool that is widely used in both the research and production areas of various metal manufacturing facilities. Universally applicable mechanisms have not been developed and acceptable, but continuing studies have produced considerable insight into the phenomena. The literature on electropolishing is vast, with many electropolishing solutions reported for a wide variety of metals.