Experimental device for static state high-temperature naphthenic acid erosion

Abstract

The invention discloses an experimental apparatus for testing the static high temperature naphthenic acid corrosion, which comprises a container with a cover plate, a ceramic electric hot plate wraps the outside of the container, two test piece frames are arranged in the container, an upper glass bar and a lower glass bar are disposed between the two test piece frames horizontally for hanging samples, two temperature sensors and a condensing device are fixed on the cover plate, one end of each sensor of the two temperature sensors extends into the container, and the other end thereof is respectively connected with a temperature measurement controller and an electronic temperature demonstrator. The condensing device is provided with a water inlet and a water outlet, the water inlet is connected with a pump, and the water outlet is connected with a sink. The apparatus of the invention has advantages of simple structure, convenient operation, available simultaneous corrosion tests of liquid phase and gas phase corrosion media under the same temperature, and high work efficiency; ensuring the stable internal pressure and acid value of the container; reliable test results; and realizable controlling and monitoring to corrosion conditions, and being favorable for the real-time operation in the corrosion process. The experimental apparatus is applied to the scientific research field of high temperature naphthenic acid corrosion acts.

Description

technical field [0001] The invention relates to a device for testing the corrosion resistance of materials, in particular to an experimental device for static high-temperature naphthenic acid corrosion. Background technique [0002] Naphthenic acid corrosion is the old enemy of the petroleum industry. It is a form of corrosion that often occurs in high temperature parts of petroleum distillation towers and oil transfer lines. Since humans became aware of it 80 years ago, it has been causing damage to oil refining equipment. Due to the lack of effective test equipment, etc., the corrosion mechanism of naphthenic acid is not yet fully understood. At present, the research on naphthenic acid corrosion is still one of the hotspots of international refineries. In order to understand the cause and mechanism of material corrosion damage and formulate corresponding preventive measures, it is necessary to conduct experimental research on the corrosion resistance of materials. [0...

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Problems solved by technology

The main manifestations are: the working efficiency of the device is low and the operation is complicated; the corrosion process is full of immersion, and only the corrosion behavior in a single state of the corrosive liquid can be investigated; it is difficult to ensure the stability of the corrosion environment pressure and acid value; Based on chemical experimental equipment, its process parameters and various conditions are not easy to be strictly controlled, and the consistency and controllability of naphthenic acid corrosion are relatively poor

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