Search Results for electrolytic polishing

Metallographic preparation of a material involves the elimination of artifacts or scratches from fine polishing and may be achieved by methods such as attack polishing, vibratory polishing, chemical polishing, electrolytic polishing, and electromechanical polishing. This article discusses the mechanism, operating procedure, advantages, and limitations of chemical and electrolytic polishing of samples for metallographic preparation. It provides information on the specimen preparation, apparatus used, and safety precautions to be followed during the polishing process. The various groups of electrolytes used in electropolishing of several metals and alloys are reviewed. The article concludes with a discussion on local electropolishing.

This article provides a discussion on the metallographic techniques used for failure analysis, and on fracture examination in materials, with illustrations. It discusses various metallographic specimen preparation techniques, namely, sectioning, mounting, grinding, polishing, and electrolytic polishing. The article also describes the microstructure examination of various materials, with emphasis on failure analysis, and concludes with information on the examination of replicas with light microscopy.

Electropolishing is an electrochemical process that involves anodic dissolution of a metal specimen (anode electrode) in an electrolytic cell. This article reviews the two-electrode and three-electrode systems for electropolishing. It presents the equations of anodic reactions and the selection criteria of electrolyte for electropolishing. The article also describes the mechanism of electropolishing and the effect of electropolishing on properties of metals.

This article describes the methods and equipments involved in the preparation of specimens for examination by light optical microscopy, scanning electron microscopy, electron microprobe analysis for microindentation hardness testing, and for quantification of microstructural parameters, either manually or by the use of image analyzers. Preparation of metallographic specimens generally requires five major operations: sectioning, mounting, grinding, chemical polishing, and etching. The article provides information on the principles of technique selection in mechanical polishing, and describes the procedures, advantages, and disadvantages of electrolytic and chemical polishing. It also provides a detailed account of procedures, precautions, and composition for preparation and handling of etchants.

This article describes the microstructure of copper alloys, including copper-zinc (brasses), bronzes, copper-nickel, and copper-nickel-zinc, and examines the effect of oxygen content on alloy phases observed in different product forms. The article also discusses inclusions, etchants, and the effect of composition and processing on grain structure and growth rates.

This article discusses the advantages and disadvantages of field metallography and describes the important material characteristics and other aspects to be considered before performing any metallographic procedure. It investigates the various stages of sample preparation in the metallographic laboratory: grinding, polishing, etching, preparing a replica, and obtaining a small sample. The article also illustrates the applications of field metallography with case studies.