According to the NACE SP0391 standard, polyethylene (PE) and polypropylene (PP) are prone to environmental cracking in concentrated sulfuric acid. The standard highlights that:
“The likelihood of cracking increases with higher acid concentrations and temperature, and a careful review of the...
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A broken pump shaft made of 1.4021 stainless steel failed at room temperature. The broken surface looks smooth and shiny, with some sparkles when tilted. Under the microscope, the cracks mostly followed the grain boundaries (intergranular fracture), which usually points to brittle...
