A seawater anti-corrosion coating corrosion resistance test device and its control method

Abstract

A seawater anti-corrosion coating corrosion resistance testing device comprises a testing platform and a control platform. The testing platform is composed of a plurality outdoor exposure hangers and a seawater supply system, each outdoor exposure hanger comprises two supporting uprights, a rectangular exposure platform is rotatably connected between top ends of the corresponding supporting uprights, a semicircular positioning hole plate is arranged at each joint, a straight side of each positioning hole plate is fixedly connected with the corresponding exposure platform, and each supporting upright is connected with an angle positioning hole through a positioning plug pin; a lifting device is arranged on each exposure platform, a seawater pipeline is arranged on each lifting device, a plurality of atomizing nozzles facing the corresponding exposure platform are arranged at a flowing-out end of each seawater pipeline, and a plurality of fixing plates for placement of testing pieces are movably arranged on each exposure platform; the seawater supply system comprises a sweater pool, a seawater pump, a constant-pressure tank and a water supply pipe which are communicated sequentially, and the control platform is composed of a touch screen and a PLC (programmable logical controller) control unit connected with the touch screen. The seawater anti-corrosion coating corrosion resistance testing device is high in automation level and scientific and reliable in testing result.

Description

technical field [0001] The invention belongs to the technical field of seawater corrosion test devices, in particular to a seawater corrosion resistance test device for anticorrosion coatings and a control method thereof. Background technique [0002] Seawater is a very complex multi-component aqueous solution, in which sodium chloride with a concentration of 3% to 3.5% is its main saline component, and seawater is usually dissolved with air, so under natural conditions, seawater has a relatively strong effect on metal components. Strong corrosive. With the development of marine engineering, there are more and more fixed steel structures on the sea and the coast. In addition to the phenomenon of seawater immersion corrosion, these steel structures are usually also corroded by seawater splashing. In the sea water splash area, the corrosion degree of the steel structure is the most serious when it is exposed to moisture and oxygen for a long time. Therefore, anti-corrosion c...

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Problems solved by technology

The corrosion environment of this method is real, but it has the following disadvantages: the test period is generally long, the cost is relatively high, it is difficult to detect the corrosion state in real time, and the test data is highly discrete, which is not conducive to the analysis of specific factors

Most of the test devices in the prior art adopt a fully enclosed design. The test is carried out by simulating the environment of the ocean splash zone. The test environment is stable, the controllability is high, and the test period is relatively short, but there are still many shortcomings. place

First of all, there are always differences between the simulated environment and the natural environment, such as light conditions, air conditions, etc., which have a greater impact on the test results; secondly, most devices use seawater or spray simulation on the test piece. The seawater method, during the test, the anti-corrosion coating is greatly affected by the impact of sea water, which affects the accuracy of the test results, and the most authentic data of the corrosion resistance of the anti-corrosion coating cannot be obtained

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