Practical Test on Brass Valves Using the 5% Ammonia Test to Elucidate the Reasons of Specific Failure Patterns of Stress Corrosion Cracking SCC

摘要

The mechanisms initiating stress corrosion cracking (SCC) are known and are adequately described in the technical references [1 -5], These references here generally proceed from the fact that this type of corrosion requires the simultaneous existence of three initiating factors: 1.a material susceptible " to SCC, 2. tensile stresses which are large enough, and 3. a corrosive medium with ordinary tap water being sufficient already [4].