Immersion tests

Immersion tests are performed in accordance with ISO 2812. Coated test panels are fully or partially immersed in a test liquid, a homogeneous liquid mixture, or a 2- or 3-phase liquid mixture at a specific temperature and for a duration that can vary from 24 hours to 6 months. ISO 2812-1 describes testing in liquids other than water. ISO 2812-2 concerns immersion in water.
The well-known steel preservation standard ISO 12944-6 specifies immersion tests in NaOH, sulfuric acid, and mineral spirits for a duration of 1 week according to ISO 2812-1 for corrosion category C5-I. In addition, water immersion according to ISO 2812-2 is conducted for 2,000 or 3,000 hours for the Im corrosion categories.

The laboratory also performs so-called one-side testing according to NACE TM-0174 or ASTM C868, also known as the Atlas cell method, which simulates a non-insulated storage tank. The test can also be performed with additional cooling on the exterior.

A standard version is available for the aforementioned test; however, a pressurized version can also be selected if the temperature exceeds the boiling point of the immersion liquid.