ASTM B117-03 pdf free download.Standard Practice for Operating Salt Spray (Fog) Apparatus.
ASTM B117-03 covers the apparatus, procedure, and conditions required to create and maintain the salt spray (fog) test environment. Suitable apparatus which may be used is described in Appendix X1.
4. Apparatus
4.1 The apparatus required for salt spray(fog) exposure consists of a fog chamber, a salt solution reservoir, a supply of suitably conditioned compressed air, one or more atomizing nozzles, specimen supports, provision for heating the chamber. and necessary means of control. The size and detailed con struction of the apparatus are optional, provided the conditions obtained meet the requirements of this practice.
4.2 Drops of solution which accumulate on the ceiling or cover of the chamber shall not be permitted to fall on the specimens being exposed.
5. Test Specimens
5.1 The type and number of test specimens to be used, as well as the criteria for the evaluation of the test results, shall be defined in the specifications covering the material or product being exposed or shall be mutually agreed upon between the purchaser and the seller.
6. Preparation of Test Specimens
6.1 Specimens shall be suitably cleaned. The cleanin method shall be optional depending on the nature of the surface and the contaminants. Care shall be taken that specimens are not recontaminated after cleaning by excessive or careless handling.
6.2 Specimens for the evaluation of paints and other organic coatings shall be prepared in accordance with applicable specification(s)for the material(s) being exposed, or as agreed upon between the purchaser and the supplier. Otherwise, the test specimens shall consist of steel meeting the requirements of Practice D 609 and shall be cleaned and prepared for coating in accordance with the applicable procedure of Practice D609.
6.3 Specimens coated with paints or nonmetallic coatings shall not be cleaned or handled excessively prior to test.