System for testing stress corrosion cracking

摘要

The system for testing stress corrosion cracking (SCC) includes an autoclave having at least one heating element selectively actuated to heat the interior portion of the autoclave, the autoclave being configured for receiving a liquid and/or gas and for forming a corrosive fluid. The system also includes a circulation assembly having a flow line and a test section line. A plurality of test sections is positioned in series along the test section line and configured for receiving the corrosive fluid via the test section line once the required temperature is reached to expose the specimens directly to the corrosive fluid, the fluid flowing through a section of the flow line parallel to the test section line until the required temperature is reached. The circulation assembly includes a circulating pump, a flowmeter positioned along the flow line, and a pressure assembly mounted on the autoclave.

主权项

1. A system for testing stress corrosion cracking (SCC), comprising:
an autoclave having at least one heating element, an outlet port, and a return port, the autoclave being adapted for heating a corrosive fluid; a plurality of test sections, each of the test sections having:
a corrosive cell defining a test chamber;an inlet port;an outlet port;a flow channel extending through the test chamber between the inlet port and the outlet port;a central channel extending through the test chamber orthogonal to the flow channel, the central channel being configured for supporting a circumferentially notched tensile (CNT) specimen therein with the notch in the specimen exposed in the flow channel; anda tension loading assembly adapted for applying a constant tensile stress to the CNT specimen; and a circulation assembly having a circulation pump, a flow line forming a circulation loop between the outlet port of the autoclave and the return port of the autoclave and a test section line connecting each of the plurality of test sections connected in series, the flow line being in fluid communication with the test section line; whereby the system is configured for testing a plurality of specimens for stress corrosion cracking in the presence of a flow of corrosive fluid being circulated by the circulation pump.