Paints & varnishes – determination of resistance to cyclic corrosion conditions, Part 1: wet(salt fog)/dry/humidity
This test method has been found to be useful for comparing the relative resistance to corrosion of paints, varnishes and similar materials, when exposed to a simulated aggressive outdoor environment, such as a marine environment. It is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
Cycle D is based upon the requirements of JIS K 5621 – 2003 test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of the following repeating cycle. 30 Minutes of salt spray @ 30C (+/-2C) followed by wetting for 90 minutes @ 30C (+/-2C) & 95%RH (+/-3%), followed by drying @ 50C (+/-2C) for 120 minutes, and drying @ 30c (+-/2C) for 120 minutes. The following transition times apply
- 10 minutes from salt spray to wetting
- 15 minutes from wetting to hot drying
- 30 minutes from hot drying to warm drying
- instantaneous from warm drying to salt spray
Total cycle time is 6 hours, unless otherwise agreed Cycle D repeats for 28 cycles (168h)
Chamber volumes of less than 400 Litres are not permitted by this test standard.
These tests are also referred to as a Cyclic Corrosion Tests, often abbreviated to CCT.
For further information on ISO standards visit; www.iso.org
Note; many ISO test standards have been harmonized with other European standards and these are now prefixed ‘EN’ (Euro Norm) or ‘** EN’ – where ** are the letters representing a European country/language code, for example ‘BS EN’ for a harmonized British standard in English language.
Kesternich testing simulates acid rain or industrial chemical exposure to evaluate the relative corrosion resistance of the coating, substrate, or part itself. Parts or panels are placed inside a specially designed chamber and are exposed to Sulphur Dioxide (So2) and humidity before being evaluated for resistance to corrosion. The following standard used in this type of test.
ISO 22479 specifies a method for assessing the resistance of materials or products to a humid atmosphere containing sulfur dioxide.
This method is applicable to testing metals and alloys, metallic and non-organic coatings and organic coatings.
Kesternich testing simulates acid rain or industrial chemical exposure to evaluate the relative corrosion resistance of the coating, substrate, or part itself. Parts or panels are placed inside a specially designed chamber and are exposed to SO2 and humidity before being evaluated for resistance to corrosion. The following standard used in this type of test.
BS3900 Part F9 is used to test Paints and varnishes and determine the resistance to humidity using continuous condensation.
Kesternich testing simulates acid rain or industrial chemical exposure to evaluate the relative corrosion resistance of the coating, substrate, or part itself. Parts or panels are placed inside a specially designed chamber and are exposed to SO2 and humidity before being evaluated for resistance to corrosion. This standard used in this type of test.
Kesternich testing simulates acid rain or industrial chemical exposure to evaluate the relative corrosion resistance of the coating, substrate, or part itself. Parts or panels are placed inside a specially designed chamber and are exposed to SO2 and humidity before being evaluated for resistance to corrosion. The following standard used in this type of test.
DIN 50018 – Testing in a saturated atmosphere in the presence of sulphur dioxide (So2).
This standard specifies the general conditions and procedures for the testing of test specimens in condensation atmospheres in the presence of sulfur oxide – and specifically for sulfur dioxide concentrations that are not included in DIN EN ISO 6988:1997-03 – and which are required to be complied with to ensure that the results of tests carried out in different laboratories are reproducible. If a particular concentration has not been specified, testing is to comply with DIN 50018 – AHT 1,0 S. It is advisable to test only same-type anti-corrosion systems at the same time in any one apparatus, as interactions between test specimens of different systems cannot be excluded.
Kesternich testing simulates acid rain or industrial chemical exposure to evaluate the relative corrosion resistance of the coating, substrate, or part itself. Parts or panels are placed inside a specially designed chamber and are exposed to SO2 and humidity before being evaluated for resistance to corrosion. The following standard used in this type of test.
ISO 3231:1993 is used to verify Paints and varnishes. It determines the resistance to humid atmospheres containing sulphur dioxide (So2). The principle of the procedure specified is to expose a coated test panel to specified humid atmospheres containing sulfur dioxide. A volume of 0.2 litre, measured at atmospheric pressure, is generally recommended for testing coatings of thickness not exceeding approximately 40 µm. The effects of exposure are then evaluated by laid out criteria. Applies to single-coat film or a multi-coat system of paints.
Kesternich testing simulates acid rain or industrial chemical exposure to evaluate the relative corrosion resistance of the coating, substrate, or part itself. Parts or panels are placed inside a specially designed chamber and are exposed to SO2 and humidity before being evaluated for resistance to corrosion. SFW 2,0 is a concentration level used in DIN 50018:1997
Kesternich testing simulates acid rain or industrial chemical exposure to evaluate the relative corrosion resistance of the coating, substrate, or part itself. Parts or panels are placed inside a specially designed chamber and are exposed to SO2 and humidity before being evaluated for resistance to corrosion. The following standard used in this type of test.
UNI EN ISO 6988 Test Standard is used for Metal coatings and other non-organic coatings. The standard specifies a method for assessing the corrosion resistance of materials or products to an atmosphere containing condensed moisture and sulphur dioxide. The method was found suitable for evaluating metallic coatings and other non-organic coatings.
Kesternich testing simulates acid rain or industrial chemical exposure to evaluate the relative corrosion resistance of the coating, substrate, or part itself. Parts or panels are placed inside a specially designed chamber and are exposed to SO2 and humidity before being evaluated for resistance to corrosion. The following standard used in this type of test.
ISO 6988:1985 specifies a method for assessing the resistance of materials or products to condensed moisture containing SO2. The method has been found to be suitable for testing metallic and non-organic coatings. Gives apparatus and material, test specimens, methods of exposure, procedure, test duration, cleaning of specimens, evaluation of results and test report.
