The salt spray (or salt fog) test is a standardized and popular corrosion test method, used to ASTM B was the first internationally recognized salt spray standard, originally published in Other important relevant standards are. Designation: B – 07a Standard Practice for Operating Salt Spray (Fog) Apparatus1 This standard is issued under the?xed designation B. ASTM B Testing, also known as a Standard Practice for Operating Salt ASTM B Testing requires controls over many operational parameters such as: .

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Vent piping should be of sufficient size so that a minimum of back pressure atsm and should be installed so that no solution is trapped. Spraying of test solution.

These standards describe the necessary information to carry out this test; testing parameters such as temperature, air pressure of the sprayed solution, preparation of the spraying solution, concentration, pHetc.

The procedure involves the exposure of steel test panels and the determination of their mass losses in a speci?

Salt spray test – Wikipedia

This acceleration arises through the use of chemically altered salt spray solutions, often combined with other test climates and in most cases, the relatively rapid cycling of these test climates over time. The salt used shall be sodium chloride with not more than 0. The most appropriate test cycle and spray solutions are astj be agreed between parties. NOTE 3—Temperature affects the pH of a salt solution prepared from water saturated with carbon dioxide at room temperature and pH adjustment may be made by the following three methods: The values given in parentheses are for information only.



The fallout rate should be measured for 16 hours and it must range from 1. For example, a typical electroplated zinc and yellow passivated steel part lasts 96 hours in salt spray astmm without white rust.

Dashed chart lines indicate temperature tolerance limits. Evaluation of Results Suspension from glass hooks or waxed string may be used as long as the speci?

This test can be used to test the relative resistance to corrosion paints on steelwhen exposed to a changing climate of dilute salt spray at ambient temperature, followed by air drying at and elevated temperature.

Technical features are subject to change without b117-07aa notice Power: The test duration is variable.

Most commonly, the time taken for oxides to appear on the samples under test is compared to expectations, to determine whether the test is passed or failed. Other test solutions have other chemicals added including acetic acid often abbreviated to ASS and acetic acid with copper chloride often abbreviated to CASS each one chosen for the evaluation of decorative coatings, such as electroplated copper-nickel-chromium, electroplated copper-nickel or anodized aluminum.

Test, Measure and Control. Sodium chloride containing anti-caking agents shall not be used because such qstm may act as corrosion inhibitors.

SAL 400-FL

Thus, the level of the solution in the salt reservoir must be maintained automatically to ensure uniform fog delivery during the test. The distribution of the salt fog inside the test chamber has to be regularly checked. Please find more details at www. Your comments are invited either for revision of asttm standard or for additional standards and should be addressed to ASTM International Headquarters. All other water will be referred to as reagent grade.


If there is a minimum volume required by a particular salt spray test standard, this will be clearly stated and should be complied with. ISO standards by standard number. A common method of introducing the air is through an air dispersion device X1. NOTE 12—Recommended exposure periods are to be as agreed upon between the purchaser and the seller, but exposure periods of multiples of 24 h are suggested. Regarding any new applications, it is essential to correlate the results of this practice with actual?

Please log in, in order to get access to prices, ordering and inquiry functions. The pH measurement shall be made as described in 8.

Care shall be taken that specimens are not recontaminated after cleaning by excessive or careless handling. Suitably located and directed spray nozzles avoid ceiling accumulation and drip.

Testing periods range from a few hours e. A superscript epsilon e indicates an editorial change since the last revision or reapproval.