Ship coating performance comprehensive test evaluation management system

The organic protective coating on the surface of a ship will fail due to the effects of the environment in its service environment, which will eventually lead to corrosion and damage to the substation metal. Therefore, a comprehensive understanding and grasp of the physical properties of various marine coatings, mechanical properties, media-resistant immersion, anti-aging, moisture-resistant heat and salt spray data, combined with the actual service performance of coatings on the ship test data, the ship in different environments of coating selection and timely maintenance is very important. In the process of many years of use and maintenance of marine coatings, accumulated a large number of complex experimental data and performance evaluation results, relying only on the traditional manual way to access relevant information, has been unable to meet the needs of researchers .
, it is urgent to develop a ship coating performance testing data management system, the above-mentioned test data and evaluation results for a comprehensive and effective management; At the same time, with the help of advanced computer software technology, the performance scoring results of coatings are easily weighted, which helps to compare, screen and evaluate the performance of various marine coatings and coating systems in use, and in addition, the ship coating has accumulated a large amount of real ship detection data in the course of service.
, this study designed a real ship detection database, as a comprehensive test and evaluation management system for marine coating performance is a useful supplement. Some research units at home and abroad have designed and developed some software systems related to material corrosion and failure, but so far, there are still very few software related to material corrosion in the marine environment. Therefore, the development of the software, can make a large number of paint inspection data management more efficient, orderly, but also to make the daily ship management and maintenance more convenient.
1 Software design
1. 1 Ship paint type and performance testing project
Ship coating performance comprehensive test and evaluation management system for ship service and management to provide information support platform, currently covers 12 categories of ship-specific coatings, including ship anti-rust primer, ship anti-fouling paint, hull and superseeded building exterior Finish paint, non-slip deck paint, non-slip deck paint, freshwater cabin paint, oil tank paint, ballast paint, living cabin paint, battery compartment coating, flame retardant coating and other special coatings, other special coatings include pressure-resistant coating, absorbent coating, transmission coating and so on.
12 Specific performance items for coating testing vary, with a total of 7 performance items, namely: physical performance, mechanical performance, media-resistant immersion performance, salt spray resistance, aging resistance, moisture-resistant heat resistance, and electrochemical properties (coating impedance). In addition to these 7 items, some categories of coatings include their own unique paint properties, such as: anti-rust primer cathode stripping performance, anti-fouling paint salt water and water resistance, hull paint and non-slip deck paint weather resistance and thermal reflection, non-slip deck Scrub resistance of paint, toxicity of freshwater and living cabin coatings, surface resistance of oil tank paint, insulation resistance and electrical strength of battery compartment coatings, flame retardant properties of flame retardant coatings, and pressure-resistant coatings require attention to alternating performance of pressure and wet and dry. Several major performance includes many aspects of detection, such as: the physical properties of the coating including appearance, viscosity, fineness and other 8 detection content, coating mechanical properties have adhesion, flexibility, impact resistance, including immersion resistance, including distillation water resistance, acid resistance, alkalinity and other testing items.
1. 2 Database function module design
based on the above ship coating type and performance testing project research, as well as the existing detection data, the ship paint performance comprehensive test evaluation management system database using The relationship dynamic database based on Access 2003. The database contains 12 main libraries: paint basic information database, coating physical performance database, mechanical performance database, immersion test database, salt spray test database, wet heat test database, anti-aging experimental database, cathode-resistant stripping database, coating impedance database, real ship detection database, national standard information database, scoring standard database, and several auxiliary libraries. The overall database structure of the system is shown in Figure 1.
Software System Database Structure
Coating Basic Information Database: Used to store basic information about a variety of coatings, including paint names, paint numbers, manufacturers, inspection bases, inspection times, paint characteristics, and notes.
physical performance database of coatings: including the viscosity, appearance, fineness, solid content, drying, gloss, theoretical dosage, dry film thickness, storage status of the test data, phenomena and evaluation results.
mechanical performance database: including coating adhesion, flexibility, impact resistance and other test data and evaluation results.
Immersion Test Database: Includes data, phenomena and evaluation results of coating-resistant salt water, distillate-resistant water, acid-resistant, alkali-resistant, acceleration-resistant liquid, oil-resistant water mixing, diesel-resistant, kerosene-resistant, gasoline-resistant, etc.
Salt Mist and Wet Heat Test Database: Including coating "×" test board, undated "×" whole board salt-resistant fog, "×" test board, undated "×" whole plate wet-heat resistance test phenomenon and evaluation results.
information about coatings: national standards and industry scoring standards for tests such as coatings, physical properties, mechanical properties, immersion tests, salt spray tests, wet heat tests, etc.
Some coating other performance databases include: test phenomena and evaluation results for cathode stripping, coating impedance, aging resistance, weather resistance, thermal reflection, scrub resistance, toxicity, surface resistivity, flame retardant properties, water resistance, etc. It is not repeated here.
ship detection database: is a database that can run relatively independently. Includes 2 main libraries of on-site ship databases and laboratory standard libraries, as well as 2 auxiliary sub-libraries of coating system libraries and corrosion environment libraries. Among them, the laboratory standard library stores various marine coatings in a specific corrosion environment from the beginning of corrosion to failure at different time periods of 10 Hz frequency phase angle and other impedance data, mainly as the field ship database coating service life prediction basis, the current data have more than 100 sets. The on-site ship database is used to store the ship's basic information (ship name, ship type, note information, etc.); At the same time, the impedance data such as the surface state, historical maintenance status and phase angle at 10 Hz frequency of coatings in different parts of the ship are recorded during different periods of service. Based on the above information, the service performance of the ship coating can be analyzed and evaluated, and the life prediction of the coating can be combined with the relevant laboratory standard data. The basic principle of coating life prediction is: phase angle attenuation at 10 Hz frequency of the coating system over time and coating low frequency impedance values Z. . . 0. 01 Hz) Similarity of the law of attenuation over time, using the phase angle at the 10 Hz frequency measured in the field, compared with the phase angle at 10 Hz frequency of similar coatings in the laboratory over time, to predict the remaining life of the coating service in one part of the ship.
1. 3 Software operation process
after the software system is densed, the first is to select the coating category. The detailed detection data and evaluation results of the major items of the selected category of coatings are then queried and counted, as well as the basic operations of the database such as adding, modifying and deleting, as well as the export and printing of the data. The operating flow of the software is shown in Figure 2.
Software Operation Flow Chart
enters the real ship inspection module, first of all, selects the ship name and the selected ship site, the ship's different parts correspond to the corresponding coating system, in this real ship inspection module and the ship coating performance detection data module is associated. After selecting the ship site, the coating detection data can be filled in and modified, the phase angle at a specific frequency can be drawn over time, the coating can be analyzed, evaluated, and the remaining life of the coating service can be predicted. Figure 3 is a flowchart of the real ship inspection module.
Real ship inspection flow chart
2 software functions and the realization of
2.1 software functions
ship paint performance comprehensive test and evaluation management system using a modular design, the function of the software is divided into 5 modules: ( 1) the comprehensive management of various detection data, including input, modification, deletion, etc. (2) Data maintenance, data compression, backup functions, regular compression of old data storage and backup, in order to speed up the operation of the system and save space; ( 3) Data query function, including accurate query of data and conditional query, results can be exported and printed; (4) Data calculation function, according to user needs of the data, such as the paint performance score results weighted calculation; (5) Coating performance evaluation: According to the test data results of ship coating performance, the comprehensive performance evaluation of such coatings and coatings, and the performance evaluation and life prediction of the active coating can also be carried out by the actual ship inspection data.
2. 2 software implementation
using VB 6. 0 programming, the realization of marine coating performance comprehensive test evaluation management system. The system interface adopts Windows operating style, the interface is friendly and the operation is simple. Users can select different types of coatings, and then the performance of the various performance of the coatings test data and evaluation results query and statistics, as well as add, modify, delete and other data operations. Users can also re-evaluate the overall performance of the coating by resetting the weighting factors for each performance. For example, the coating of the 001 part of a ship is the epoxy zinc-rich primer 50 m and epoxy cloud iron intermediate paint 50 m plus fat family polyurethane paint 50 m, regularly test the phase angle at the 10 Hz frequency of the coating on the site, 256 d phase angle is 36 degrees, click the prediction button, the software gives the remaining life of the coating in the site is 122 d. The actual ship tested and parsed at 130 d to obtain a coating resistance (Rp) of 0. 9 × 106 Ω.cm2, according to literature reports, when the Rp is below 106 Ω.cm2 coating is close to failure. Therefore, the forecast results are more consistent with the actual results.
3 Conclusion
(1) With Access 2003 as the database platform and Visual Basic 6. 0 as the development tool, the integrated test and evaluation management system of marine coating performance is designed and implemented, and the comprehensive management of the original data, score and other information of the 12 categories of coatings used in ships is realized.
(2) to achieve the paint and coating performance of the query statistics and comprehensive performance evaluation, users can be weighted by weighting factors for the performance of the coating and coating weighted score, a comprehensive understanding of the comprehensive performance of a variety of marine coatings, coating selection has an important reference role.
(3) set up a marine paint real ship inspection database, a variety of coatings in the real ship test data for comprehensive management, and coating service performance evaluation and life prediction. The library is a useful complement to the management of ship coating performance detection data.
(4) has set up a library of relevant information to help users understand and master national standards and industry scoring standards.