Accelerated corrosion test involving exposure under controlled conditions of humidity and intermittent spraying of salt solution
Accelerated corrosion tests to simulate atmospheric corrosion in such environments include cyclic exposure to a wet phase, during which the test object is repeatedly subjected first to a spray of salt solution then to a wet stand-by period for several hours. This is followed by a phase of controlled cyclic humidity conditions, where the test object is subjected to an environment which alternates between high humidity and comparative dryness.
In the first (wet) phase of exposure, the test objects are sprayed for 15 min with a 1% (mass fraction) aqueous solution of sodium chloride acidified to pH 4.2, to simulate the rather acidic precipitation present in industrialized areas, followed by a 1 h 45 min period of wet stand-by. This sequence is repeated three times to give a total of 6 h exposure to wetness. The whole of this first phase of the test cycle is repeated twice a week.
The major part of the test cycle, however, consists of humidity cycling between the two levels of 95 % RH and 50 % RH at a constant temperature of 35°C.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.