Chemical resistance is measured using a variety of standardized tests to determine a material’s ability to withstand chemical attack. Key methods include:
- Immersion Tests: The material is immersed in a chemical for a specified period, and changes in weight, dimensions, and mechanical properties are measured.
- Exposure Tests: The material is exposed to vapors or liquid chemicals under controlled conditions, and its surface and structural integrity are evaluated.
- Dynamic Tests: Involves subjecting the material to chemical exposure under conditions that simulate real-world usage, such as flow-through systems.
- ASTM and ISO Standards: Specific tests like ASTM D543 for plastics or ISO 1817 for elastomers provide standardized procedures for evaluating chemical resistance.
These tests help determine the suitability of materials for different environments and applications by assessing their long-term durability and performance when exposed to various chemicals.