IS 9954-1981

标准号：IS 9954-1981
发布日期：1982/3/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This standard specifies four different grades of rust ( A, B, C and D) developed on the surface of steel, and recommends preparation of these rust grades to either two grades of surface preparation ( St 2 and St 3 ) when scraping and wire brushing is employed or four grades of surface preparation ( Sa 1, Sa 2, Sa 2 1/2 and Sa 3 ) when blast cleaning is employed.The recommended rust and preparation grades are defined by colour prints representing a full scale view of part of the surface.Note — The cleaning techniques to be adopted for achieving the different grades of surface preparation has been covered in IS: 1477 (Part I)-1971t〓