IS 5528 : 2024/ISO 9227 : 2022 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests
(Superseeding IS 6910 : 1985, IS 9844 : 1981 and IS 11864 : 1986)
NATIONAL FOREWORD
This Indian Standard (Second Revision) which is identical to ISO 9227 : 2022 'Corrosion tests in artificial atmospheres salt spray tests' issued by the International Organization for Standardization (ISO), was adopted by the Bureau of Indian Standards on the recommendation of Corrosion Protection and Finishes Sectional Committee and approval of the Metallurgical Engineering Division Council.
This standard was first published in 1969 and subsequently revised in 1985. This revision has been undertaken to align with the international standard ISO 9227 : 2022 under dual numbering system.
With this revision, following Indian Standards on salt spray tests shall stand withdrawn subsequently since this revised standard is a comprehensive standard:
IS 5528 : 1985 Method of testing corrosion resistance of electroplated and anodized aluminium coating by copper accelerated acetic acid salt spray (CASS) test IS 6910 : 1985 Method of testing corrosion resistance of electroplated and anodized aluminium coatings by acetic acid salt spray test IS 9844 : 1981 Methods of testing corrosion resistance of electroplated and anodized aluminium coatings by neutral salt spray test IS 11864 : 1986 Recommended construction practice of apparatus for spray cabinet for various salt spray tests Salt spray tests are generally suitable as corrosion protection tests for rapid analysis for discontinuities, pores and damage in organic and inorganic coatings. In addition, for quality control purposes, comparison can be made between specimens coated with the same coating. As comparative tests, however, salt spray tests are only suitable if the coatings are sufficiently similar in nature.
When interpreting test results (for example minimum time until appearance defects or protection defects) for product quality control or acceptance specifications, it is important to recognize that the salt spray test can have a low level of reproducibility, especially with production parts tested in different laboratories.
It is often not possible to use results gained from salt spray testing as a comparative guide to the long-term behaviour of different coating systems, since the corrosion stress during these tests differs significantly from the corrosion stresses encountered in practice.
The text of ISO standard has been approved as suitable for publication as in Indian Standard without deviations. Certain terminologies and conventions are, however, not identical with those used in Indian Standard. Attention is especially drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, it should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards the current practice is to use a point (.) as the decimal marker.