Verification of Concepts for Robotic and Real-Time Etching in Metallography

Metallography is a traditional discipline where precision and repeatability in sample preparation are crucial. However, standard etching methods often rely on operator experience, leading to variability in results. This work presents the concept of robotic etching, which eliminates human influence, ensures consistent timing and movement control during the process, and allows efficient integration with other laboratory procedures. Although robotic etching currently employs predetermined etching times based on prior experience and optimization, significant benefits of this method have already been demonstrated during the optimization stage itself. Particularly for electrolytic etching, this standardized robotic approach consistently achieves reliable and repeatable results, even with materials that are notoriously challenging to prepare. Additionally, real-time monitoring of the sample surface using a stereomicroscope (initially tested without robotic integration) offers further potential by enabling termination of the etching process precisely at the optimal moment. Combining robotic control with real-time monitoring thus represents a promising approach with the potential to significantly enhance the repeatability and quality of sample preparation, effectively reducing variability and minimizing the role of chance in the etching procedure. The results validate the feasibility of these methods and highlight their significant potential for enhancing efficiency and quality control in metallography.

金相学（Metallography）是一门传统学科，样品制备的精度与可重复性在其中至关重要。然而，标准蚀刻（etching）方法往往依赖操作人员的经验，导致结果存在差异。本研究提出了机器人蚀刻的概念，该方法可消除人为影响，确保过程中时间控制与运动控制的一致性，并能高效整合至其他实验室流程中。尽管机器人蚀刻目前仍基于过往经验与优化结果采用预设蚀刻时间，但该方法的显著优势在优化阶段已得到充分验证。尤其在电解蚀刻（electrolytic etching）方面，这种标准化的机器人方法即便针对制备难度极大的材料，也能持续获得可靠且可重复的结果。此外，利用体视显微镜（stereomicroscope）对样品表面进行实时监测（初期测试未与机器人集成），可通过在最佳时机精准终止蚀刻过程，进一步挖掘该方法的潜力。因此，将机器人控制与实时监测相结合，是一种极具前景的方法，有望显著提升样品制备的可重复性与质量，有效降低蚀刻过程中的结果差异，并最小化偶然性因素的影响。研究结果验证了这些方法的可行性，并凸显其在提升金相学效率与质量控制方面的巨大潜力。