Hydrogen sulfide stress corrosion-preventing four-point bending test fixture

Abstract

The invention discloses a hydrogen sulfide stress corrosion-preventing four-point bending test fixture. Steps for placing samples are arranged at two bottom sides of the fixture; loading blocks are arranged at central positions of the upper parts of the two steps; the tops of the loading blocks are connected with the fixture through loading screws; and balance sensor strain gauges are pasted at both two sides of the fixture. During the user, one ends of the balance sensor strain gauges are pasted on the fixture and the other ends are pasted on the loading blocks; and the balance sensor straingauges are connected with digital recording equipment for recording test data through signal wires. When the samples are broken in the test process, the loading blocks are in unbalanced states, and the unbalanced states are transmitted to the digital recording equipment through the balance sensor strain gauges to correctly record the sample failure time and then provide reliable basis to better research hydrogen sulfide stress corrosion.

Description

Technical field: [0001] The invention relates to a hydrogen sulfide stress corrosion device, in particular to a four-point bending test fixture for hydrogen sulfide stress corrosion resistance. Background technique: [0002] Hydrogen sulfide stress corrosion is in the tensile stress, H 2 Cracking under the combined action of S and water, hydrogen sulfide stress corrosion failure has the characteristics of sudden, no delay and no warning, and its damage to the safe operation of oil and gas pipes is fatal. Therefore, the hydrogen sulfide stress corrosion test process In this process, mastering the fracture failure time is very important. [0003] The hydrogen sulfide four-point bending stress corrosion test is to immerse a set of loading fixtures and samples in the corrosive medium at the same time. inaccuracy. The hydrogen sulfide stress corrosion resistance of different oil and gas pipes cannot be compared horizontally, so it is impossible to measure their stress corrosio...

AI Technical Summary

Problems solved by technology

Although this device can detect, evaluate and accurately analyze the hydrogen sulfide stress corrosion cracking resistance of pipes, plates or equipment, it cannot accurately record the failure and fracture time of samples.

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