FAQs
Salt spray testing is an accelerated corrosion test used to evaluate the resistance of coatings, metals, and materials in a controlled salt mist environment. It simulates harsh conditions to predict long-term durability
ASTM B117 is an internationally recognised standard that defines how to perform salt spray (fog) testing. It specifies temperature, salt concentration, and testing conditions to ensure consistent and repeatable results.
ISO 9227 is a global standard for salt spray testing that outlines methods such as Neutral Salt Spray (NSS), Acetic Acid Salt Spray (AASS), and Copper Accelerated Acetic Acid Salt Spray (CASS).
Salt spray tests can last from 24 hours to over 1,000 hours, depending on the material and required corrosion resistance. The duration depends on industry standards and customer specifications.
Cyclic corrosion testing (CCT) is an advanced method that exposes samples to repeated cycles of salt spray, humidity, drying, and sometimes temperature changes. It is designed to better simulate real-world environmental conditions compared to traditional corrosion tests
Salt spray testing uses a continuous salt mist, while cyclic corrosion testing alternates between multiple environments such as wet, dry, and humid conditions.
Cyclic testing provides a more realistic simulation of outdoor corrosion, whereas salt spray is mainly used for quality control and comparison testing
Cyclic corrosion testing is recommended when:
– Predicting real-world product lifespan
– Testing automotive or outdoor components
– Evaluating advanced coatings
Salt spray testing is more suitable for routine quality control and standard compliance.
Common cyclic corrosion standards include:
– SAE J2334
– FORD CEPT
– Honda 5100Z
– VDA 233-102
– GMW 14872
– ISO-based automotive standards
These tests are often manufacturer-specific and designed to simulate real-world environments
Use Salt Spray Testing when:
– You need fast, repeatable results
– You are performing routine quality checks
– Compliance with ASTM B117 or ISO 9227 is required
Use Cyclic Corrosion Testing when:
– You need to simulate real-world conditions
– Testing for automotive or outdoor environments
– Evaluating long-term durability and coating performance