Erosion-corrosion experiment device for simulating spray splashing area

A technique of corrosion experiment and wave splashing, which is applied in measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., and can solve the problems that the results of synergistic effects cannot be included in the research scope, etc.

Inactive Publication Date: 2015-08-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, because there are many factors affecting the corrosion environment in the splash zone, such as salt concentration, wave size, wave period, sand content, oxygen content, light, temperature, etc., the existing device can only realize the research of some influencing factors, and cannot The synergistic results of many influencing factors are included in the research scope

Method used

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  • Erosion-corrosion experiment device for simulating spray splashing area
  • Erosion-corrosion experiment device for simulating spray splashing area
  • Erosion-corrosion experiment device for simulating spray splashing area

Examples

Experimental program
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Effect test

Embodiment

[0026] Using relevant equipment, using NaOH to adjust the pH to 8 3.5% NaCl solution, under the conditions of impact velocity 5.4m / s and impact frequency 1Hz, the arc aluminum coating, the bottom zinc surface aluminum coating, the zinc-aluminum pseudo-alloy coating, The erosion-corrosion rate of Al-Ti coatings changed with time and the corrosion current density were compared and studied, and the erosion failure mechanism was analyzed.

[0027] (1) The erosion morphology of carbon steel in the simulated splash zone is mainly corrosion pits and streamline corrosion. Corrosion pits appear in the parts directly impacted by water jets, while the streamline corrosion outside the impact angle is caused by gas-liquid two-phase flow . Cavitation plays an important role in the metal corrosion failure process in the splash zone, and improving the micro-cutting resistance of the material is beneficial to improving the erosion resistance of the material.

[0028] (2) Both the bottom zinc ...

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Abstract

The invention discloses an erosion-corrosion experiment device for simulating a spray splashing area. The experiment device is supported by a base and comprises a lifting system, a sample clamping system, a power system, an injection system, an ultraviolet illumination aging system, an electrochemical testing system and a temperature control system, wherein a hydraulic lifting frame is fixedly arranged on the base and is controlled to ascend or descend by a pedal or a pressure relief knob; the sample clamping system and the power system are mounted on the hydraulic lifting frame; a medium groove is formed in one side of the hydraulic lifting frame; the sample clamping system is arranged inside the medium groove; the upper part of the medium groove is sleeved by a sealing cover, and the sealing cover and the medium groove are sealed through a rubber sealing ring. According to the erosion-corrosion experiment device, the influence on a material erosion-corrosion behavior caused by factors such as wave impact strength, impact period, sand content, oxygen content, temperature and illumination can be researched, the failure process of an ocean spray splashing area structure is accurately simulated, and the defects of a conventional material erosion-corrosion research device for simulating a splashing area are overcome.

Description

technical field [0001] The invention relates to an erosion-corrosion experimental device and method, in particular to an erosion-corrosion research device and a method thereof under the conditions of alternating dry and wet conditions of multiple samples in a simulated wave splash area. Background technique [0002] The complex and harsh corrosive environment of the ocean hampers the development of marine resources, and the research on corrosion protection of marine structures has always been a hot topic for a long time. For the convenience of research, the marine corrosion environment is usually divided into: marine atmosphere area, spray splash area, tidal range area, full immersion area and sea mud area. Among them, the structure in the spray splash area has become the most severely corroded area in the ocean due to the joint action of various harsh factors such as sea water splash, sunlight exposure, alternating dry and wet, and sufficient oxygen supply on the surface. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N17/02G01N3/56
Inventor 赵卫民张体明王勇孙建波
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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