IS 4777-1968

标准号：IS 4777-1968
发布日期：1969/1/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This standard prescribes two methods of testing the performance of a protective scheme under corrosive conditions to determine whether a desired standard is reached. These tests are:a) the salt droplet test, andb) the IP test.1.1.1 These tests shall be made on one or more of the following:a) Standard test specimens, as defined in Section I, coated by the protective scheme concerned under actual production conditions;b) Specimens of the steel, whether metal-coated or not, used for the actual articles, to which the protective scheme has been applied under actual production conditions. These specimens shall be prepared and tested in the same way as the test specimens ( see Section I); andc) Actual articles. This applies to the salt droplet test only (see 12 ).1.2 An indication of the types of protective schemes to which the tests are most applicable is given in the foreword but no restriction is placed on their use on other types. The use of the tests for any particular purpose and the standard of performance required for such purpose are left to the discretion of those wishing to apply the specification.1.3 For certain uses, the ability of a protective scheme to prevent corrosion when in the damaged condition is important. Provision is made, therefore, for the test specimens to be subjected, if desired, to a standard form of damage before they undergo test.