ASTM approves standard revision.ASTM International ASTM International (ASTM) is an international standards developing organization that develops and publishes voluntary technical standards for a wide range of materials, products, systems, and services. , West Conshohocken, PA, has announced that Committee D33 on Protective Clothing and Lining Work for Power Generation Facilities has approved a revision to standard D 4260, Practice for Liquid and Gelled Acid Etching etching, the art of engraving with acid on metal; also the print taken from the metal plate so engraved. In hard-ground etching the plate, usually of copper or zinc, is given a thin coating or ground of acid-resistant resin. of Concrete. The reason for revising the standard was to acknowledge that hydrochloric acid hydrochloric acid: see hydrogen chloride. hydrochloric acid or muriatic acid Solution in water of hydrogen chloride (HCl), a gaseous inorganic compound. is now available in two forms, liquid and gelled. The revision also includes a change to the standard name. The revised standard is under the jurisdiction of Subcommittee sub·com·mit·tee n. A subordinate committee composed of members appointed from a main committee. subcommittee Noun D33.05 on Application and Surface Preparation. |
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