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Method for testing performance of coatings of ballast tank and piping system thereof in electrolytic ballast water environment

A test method and ballast tank technology, applied in the field of experimentation, can solve problems such as not existing, affecting coating protection life, blank, etc., to achieve the effect of improving detection efficiency and shortening the research and development cycle

Inactive Publication Date: 2018-07-31
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the PSPC specification was formulated earlier than the Ballast Water Convention, the application environment of the coating during the specification and the indoor accelerated simulation test is natural seawater. With the installation of a large number of ballast water treatment systems, the active substances produced by the electrolysis of seawater are as follows It is unknown whether chloric acid, etc. will affect the coating, steel plate or cathodic protection effect, and then affect the protection life of the coating
However, at present, there are no relevant test methods in the shipping industry, national standards or even the International Maritime Organization, and domestic research on the impact of ballast water treatment systems on the performance of ballast tank coatings is even blank

Method used

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  • Method for testing performance of coatings of ballast tank and piping system thereof in electrolytic ballast water environment
  • Method for testing performance of coatings of ballast tank and piping system thereof in electrolytic ballast water environment
  • Method for testing performance of coatings of ballast tank and piping system thereof in electrolytic ballast water environment

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The coating samples were soaked in natural seawater and electrolyzed seawater with different residual chlorine concentrations and simulated ballast tank tests to compare the performance changes of the coating samples, so as to study the influence of electrolyzed seawater on ballast tank coatings.

[0042] (1) Carry out the experiment of step (3)a according to the above requirements, and soak the test sample in natural seawater (with a residual chlorine concentration of 0ppm) and electrolytic seawater with a residual chlorine concentration of 15ppm, respectively, and the test temperature is room temperature. At the 1st, 2nd, 3rd, 4th, 5th, and 6th months of the test, the scratch peeling off of the coating and the quality change of the cathodic protection zinc block were tested respectively. Among them, the scratch peeling results of the coating are shown in Table 1 and figure 2 Shown; The mass loss of coated cathodic protection zinc block is shown in Table 2 and image...

Embodiment 2

[0061] At present, in the evaluation of coating protection performance, in addition to macroscopic characterizations such as adhesion, scratches, and cathodic disbondment, electrochemical techniques such as electrochemical impedance spectroscopy can be used to effectively evaluate the relationship between coating water absorption, coating resistance, capacitance, etc. process-related parameters.

[0062] Choose a typical marine anti-corrosion coating - coating system B, coating system B is an inorganic zinc-rich primer + 2 epoxy universal primers.

[0063] Intact samples and scratched samples were prepared respectively. Among them, the intact sample was used to investigate the influence of electrolytic seawater on the permeability of the coating, and the scratched sample was used to investigate the influence of electrolytic seawater on the adhesion of the coating and the corrosion spread of the steel substrate under damaged conditions. Carry out the experiment of step (3)a ac...

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Abstract

The invention provides a method for testing the performance of coatings of a ballast tank and a piping system thereof in an electrolytic ballast water environment. Electrolytic seawater is prepared through a seawater electrolysis device; after being prepared, the electrolytic seawater is saved airtightly in a dark place; the electrolytic seawater is mixed with natural seawater according to different proportions, the concentration of the electrolytic seawater is titrated through iodometry, and electrolytic seawater with different chlorine residue concentrations is prepared; a soaking experimentand a PSPC ballast tank simulation experiment are carried out in the electrolytic seawater with the different chlorine residue concentrations. The requirements for testing the performance changes ofship protection coatings, especially the protection coatings of the ship ballast tank and the piping system thereof in the electrolytic seawater in a laboratory can be met, therefore, the paint research and development period is shortened, the detection efficiency is improved, and great practical significance is achieved.

Description

technical field [0001] The invention relates to the technical field of experimental methods, in particular to a method for testing the coating properties of ballast tanks and piping systems in electrolytic ballast water environments. Background technique [0002] The uncontrolled discharge of ballast water and sediments from ships will lead to the transfer of harmful aquatic organisms and the invasion of foreign harmful marine organisms, causing damage to the environment, human health, and ecosystems. In February 2004, the International Maritime Organization adopted the "2004 International Convention on the Control and Management of Ships' Ballast Water and Sediments" (referred to as the Ballast Water Convention), which aims to prevent , Reduce and ultimately eliminate the risks caused by the transfer of harmful aquatic organisms to the environment and ecosystems. As of July 2014, 43 countries have ratified the Convention; according to the International Shipping Association...

Claims

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Application Information

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IPC IPC(8): G01N17/02G01N1/28
CPCG01N1/28G01N17/02
Inventor 王佳妮陶乃旺王祥
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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