Abstract: A deburring and cleaning machine and process designed to successfully clean work pieces such as castings, machined parts, and the like. The machine is characterized by a freely open work piece mounting plate movable in a predetermined pattern while simultaneously allowing free falling abrasion media to fall over, around and through the work piece. The method involves positioning a work piece in an open treating area, moving the work piece in a predetermined pattern through the treating area, and simultaneously free-falling abrasive media cascading over, around and through the work piece. The open treating area and the free-fall cascading of abrasive media provide improved cleaning and deburring of internal passageways, free falling abrasive media cascading, etc.

Abstract: A process for electrolytically etching phosphorus bearing gray irons using Stead's reagent is provided. Stead's reagent, which is used as the electrolyte in the etching process is composed of 1.2% cupric chloride, 4.6% magnesium chloride, 2.8% HCl and 91.4% ethanol. The time required for etching both low and high phosphorus bearing irons is reduced to 90 seconds or less and clear grain cell definition in both high and low phosphorus-containing gray iron is achieved by using Stead's reagent as the electrolyte in an electrolytic cell wherein the specimen to be etched operates as the anode.