A device for environmental corrosion cracking test in wet hydrogen sulfide environment

Abstract

The invention discloses an apparatus for environment corrosion cracking test in a wet hydrogen sulfide environment. The apparatus can realize environment corrosion cracking test at a temperature lower than 75 DEG C in an enclosed circulating solution environment filled with hydrogen sulfide with different concentrations and gas mixtures thereof. The apparatus comprises a corrosion solution storing and circulating container, a solution circulating system, an environment corrosion cracking test sample room and an electrochemical auxiliary device, wherein the corrosion solution storing and circulating container mainly stores a great amount of a solution, the front end of the corrosion solution storing and circulating container can be additionally provided with a gas mixture interface or a gas mixture flowmeter to allow the solution to have different concentrations of hydrogen sulfide, carbon dioxide or the like, the solution circulating system comprises a magnetic drive pump, a rubber ball and a ball valve to realize siphonage at the front end and cut-off of communication with the environment corrosion cracking test sample room, and the environment corrosion cracking test sample room mainly comprises an electrochemical test interface and is used for sealing of a sample and circulation of the solution. The apparatus provided by the invention can substantially reduce leakage of hydrogen sulfide and the solution thereof, improves security of test personnel and environment and is convenient to use and applicable under a wide range of test conditions.

Description

technical field [0001] The invention relates to the field of environmental corrosion cracking in toxic corrosive atmospheres such as wet hydrogen sulfide, and specifically relates to a simple device for environmental corrosion cracking in a wet hydrogen sulfide environment, which can realize the sealing of different concentrations of hydrogen sulfide and its mixed gas circulation solution environment and reduce the environmental corrosion cracking. Device for corrosion cracking test in 75°C environment. Background technique [0002] Petrochemical resources are still the main energy supply of the global industry. With the demand of economic construction, oil fields containing corrosive atmospheres such as hydrogen sulfide and carbon dioxide in different concentrations are mined, and a large amount of corrosive crude oil containing hydrogen sulfide and other corrosive atmospheres is refined. Due to various reasons The materials in service under this condition need to carry a c...

AI Technical Summary

Problems solved by technology

In addition to the sulfide stress corrosion cracking test, the current petrochemical materials also have corrosion fatigue. When the test piece given in the above standard reciprocates relative to the device in the corresponding device, the axial seal is prone to failure and leakage occurs.

It is very necessary to develop or improve the environmental corrosion cracking device in the environment of normal pressure and not too high temperature of wet hydrogen sulfide. At present, there are no reports of related devices at home and abroad.

Images