標準號：IS 3618-1966
發(fā)布日期：1966/9/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard covers the processing of iron and steel to produce coatings consisting essentially of metal phosphates that are intended to be used in conjunction with organic coatings for protection against corrosion. The standard also covers methods of testing finished coatings. It covers five classes of phosphating processes ( both un-accelerted and accelerted as defined in 2.1 to 2.6) which are designated in terms of compositions and weights of the coatings ( see 3).1.1.1 This standard is intended for general purposes of industry and does not cover treatment of ferrous surfaces for deep drawing nor does it deal with phosphating treatment on zinc, cadmium or aluminium for passivation purpose.1.2 Certain phosphating processes, particularly heavy classes, are likely to alter the dimensions of the components and due allowance for this should be given in the design stage or in selecting the particular phosphating process.