CN1570591A - Acceleration method for barrel properties test of organic coating - Google Patents
Acceleration method for barrel properties test of organic coating Download PDFInfo
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- CN1570591A CN1570591A CN 200410023171 CN200410023171A CN1570591A CN 1570591 A CN1570591 A CN 1570591A CN 200410023171 CN200410023171 CN 200410023171 CN 200410023171 A CN200410023171 A CN 200410023171A CN 1570591 A CN1570591 A CN 1570591A
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Abstract
An accelerating method for measuring barrier property of organic coating, which is to put a smeared multiple-electrode probe or smeared coupon into a liquor with three to five percent of NaCl for some time of ultrasonic vibration. Later to test the barrier property of the organic coating through wet heat and electrochemistry. With the deployment of ultrasonic vibration, this invention can greatly decrease the testing time of barrier property to the ten percent of original time and can effectively shorten the circle of new product development and on-line measuring and monitoring and can overall evaluate adhesive force of organic coating and can improve the measuring efficiency of barrier property of organic coating so as to save manpower and materials. This invention is especially suitable for the measuring of barrier property of organic coating with good barrier property.
Description
Technical field
The invention discloses a kind of organic coating barrier propterty test accelerated method.
Background technology
Metal material is subjected to the chemistry of surrounding medium or electrochemical action and the destruction that causes is commonly referred to as corrosion of metal, because metal erosion, need often to change or repair complete machine, even scrap, directly cause metal material to lose in a large number, show that according to interrelated data the whole world is equivalent to 10% of iron and steel output approximately by the iron and steel loss that corrosion causes every year, the indirect loss that corrosion causes is even more serious.Suppress metal erosion, prolong the important connotation that be the metal protection method its serviceable life.Organic coating is coated in the metal surface protects, in whole metal protection measure, occupy sizable ratio.The assessment of organic coating barrier propterty quality adopts classical salt fog, damp and hot case to test and carry out usually, the quality that rust spot or variable color situation are determined the coating protection performance appears according to the after date test piece of different tests week, conventional salt fog, the experiment of damp and hot case usually several cycles until tens cycles, expend great amount of manpower and material resources.According to modern metal erosion theory, under the normal temperature under the environment that has water to exist corrosion of metal be an electrochemical process, the protective action of organic coating be the mechanical retardation of corrosive medium infiltration to external world and increase metal with coating interface on the polarization of electrochemical process reach the purpose of inhibition metal erosion.Research work shows, can estimate the barrier propterty of organic coating fast with electrochemical method, thereby shortens new product development and on-line measurement monitoring period.But for some system, as engineering protection coating and long-term sealed anti-rust oil, the electrochemical method with conventional is difficult to detect the electrochemical response signal at short notice.Therefore all wishing on the scientific research both domestic and external and the market demand has a kind of infiltration of energy accelerated corrosion medium and the method for rapid evaluation organic coating barrier propterty quality, to shorten test duration, accelerate the speed of product development, scientific research and online detection to the organic coating barrier propterty.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and provide a kind of process simple, easy to operate, can accelerated corrosion the infiltration of medium and the organic coating barrier propterty test accelerated method of rapid evaluation organic coating barrier propterty quality.
The present invention adopts following proposal to realize: will be coated with the test piece or the multi-electrode test probe that install and put into 3～5%NaCl solution ultrasonic vibration certain hour, subsequently, with the electrochemical method of routine or salt fog, damp and hot experiment the organic coating barrier propterty is tested, described ultrasonic power is not less than 50W, the ultrasonic vibration frequency is not less than 20KHz, and time of vibration is in 0.1 '～4h scope.
Among the present invention, ultrasonic time is an important parameter of estimating the organic coating barrier propterty, and under identical ultrasonic time, the size of the electrode probability N value that occurs by low-resistance region is differentiated the coating protection performance, and N is little, and the coating protection performance is good.
The protective action of organic coating is the mechanical retardation of the infiltration of corrosive medium to external world and increases that the polarization of electrochemical process reaches the purpose that suppresses metal erosion on metal/coating interface.Therefore the organic coating that has good barrier propterty must have good adhesion with metallic matrix, and the infiltration of corrosive medium has bigger resistance also to increase the polarization of metal/coating interface metal erosion electrochemical process significantly to external world.The present invention is by giving ultrasonic vibration to organic coating in 3～5%NaCl solution before test, reduced the adhesion of coating/metal interface on the one hand, quickened the seepage velocity of corrosive medium on the other hand, thereby reduced the relaxation time that corrosive medium arrives metal base surface to metal/coating interface.The employing electro-chemical test can be monitored the electrochemical reaction on the electrode, thereby reduces metal from beginning to be reacted to the relaxation time that rust spot occurs.Adopt ultrasonic vibration method of the present invention, can shorten the test and appraisal time greatly to organic coating barrier propterty with good barrier propterty, be approximately original 10% or below, can effectively shorten new product development and on-line measurement monitoring period, but and comprehensive evaluation organic coating adhesion, improve the test and appraisal efficient of organic coating barrier propterty, save human and material resources, the present invention is suitable for the organic coating barrier propterty is tested and assessed, and is particularly suitable for the test and appraisal to the barrier propterty of organic coating with good barrier propterty.
Embodiment
The specific embodiment of the present invention is: with oil film application test piece or be coated with the multi-electrode test probe that installs and put into 3～5%NaCl solution ultrasonic vibration certain hour, subsequently, salt fog, damp heat test or electrochemical method with routine are tested the organic coating barrier propterty, described ultrasonic vibration frequency is 28KHZ, ultrasonic vibration power is 100W, the ultrasonic vibration time is 20～30 minutes, and test result and the contrast of conventionally test experimental data see Table one:
From table one as seen, after 20 or 30 minutes ultrasonic acceleration, the part oil film corrosion promptly occurs leave standstill a period of time in damp and hot case or salt fog cabinet after, the experience one-period damp and hot or salt mist experiment after most of corrosion serious, adopt ultrasonic vibration to quicken application system corrosion process, usually can within 1～24 hour, differentiate the quality of different system barrier propterties, and routine is damp and hot, salt mist experiment needs more than ten cycles usually, could obviously detect the quality of barrier propterty, in general, normal experiment experience longer cycle, corrosion degree is low after quickening, otherwise corrosion is serious.The ultrasonic process of quickening corrosion, gained result and normal experiment basically identical.
Table one:
| Sequence number | Oil film | The hot experimental result of moisture-proof | The salt mist experiment result | ||
| Conventional | Quicken | Conventional | Quicken | ||
| 1 | 292 | Ultrasonic 30 minutes, placement a small amount of corrosion promptly occurred after 1 hour in the damp and hot case, and 1 all after date corrosions are serious. | 1 cycle non-corroding, 0 grade; 2 cycle degree of rusting (3%), 1 grade; The phase degree of rusting is 10%, 2 grade all around | Ultrasonic 20 minutes, placement a small amount of corrosion promptly occurred after 2 hours in the damp and hot case, and 1 all after date degree of rusting reach 85%. | |
| 2 | 293 | Ultrasonic 30 minutes, place after 1 hour in the damp and hot case and corrosion promptly occurs, degree of rusting about 10%, 1 all after date corrosions are serious. | 1 cycle corrosion (10%), 2 grades; 2 cycle degree of rusting (20%), 3 grades | Ultrasonic 20 minutes, place after 2 hours in the damp and hot case and more corrosion promptly occurs, degree of rusting about 10%, 1 all after date corrosions are serious, and degree of rusting surpasses 95%. | |
| 3 | 291 | Ultrasonic 30 minutes, place non-corroding after 1 hour, the rear surface variable color of 1 cycle in the damp and hot case. | One-period corrosion (3%), 1 grade; The phase degree of rusting is 25%, 3 grade all around | Ultrasonic 20 minutes, place after 2 hours in the damp and hot case and corrosion promptly occurs, 1 all after date corrosions are serious, and degree of rusting reaches 90%. | |
| 4 | 297 | Ultrasonic 30 minutes, place after 1 hour in the damp and hot case and corrosion promptly occurs, degree of rusting about 10%, 1 all after date corrosions are serious. | 1 cycle corrosion (10%), 2 grades; 2 cycles corrosion (20%), 3 grades | Ultrasonic 20 minutes, placement corrosion promptly occurred after 2 hours in the damp and hot case, and 1 all after date degree of rusting reach 85%. | |
| 5 | 111 | The corrosion of 6 cycles, 1 grade | Ultrasonic 30 minutes, placement corrosion promptly occurred after 1 hour in the damp and hot case, and the corrosion spot appears in 1 all after dates. | The corrosion of 1 cycle, 1 grade | Ultrasonic 20 minutes, placement corrosion promptly occurred after 2 hours in the damp and hot case, and 1 all after date degree of rusting reach 95%. |
| 6 | The dura mater contrast | 13 cycle rear surfaces do not have significant change. | There is a small amount of corrosion to occur after one-period | ||
| Above oil film is provided by Wuhan Inst. of Material Protection, and the dura mater contrast material is provided by Xiangtan Electrical Machinery Plant. | |||||
Another embodiment of the present invention is: with paint film application test piece or be coated with the multi-electrode test probe that installs and put into 3～5%NaCl solution ultrasonic vibration certain hour, subsequently, electrochemical method with routine is tested the organic coating barrier propterty, described ultrasonic vibration frequency is 28KHZ, ultrasonic vibration power is 100W, the ultrasonic vibration time is 30～240 minutes, and test result and the contrast of conventionally test experimental data see Table two:
Table two:
| Sequence number | Supporting coating | The ultrasonic electrochemical test result | The hot experimental result of 12 cycle moisture-prooves | Salt mist experiment result (10 days) | |||
| T (minute) | ?N | Outward appearance | Adhesion | Conclusion | |||
| 1 | Phenolic enamel | 30 | ?18.8 | The slight loss of gloss of paint film has a small amount of Ф 1.5mm rust spot | Defective | Difference | D |
| ?2 | Synthetic enamel | 30 | ?30 | There is a small amount of Ф 1 ~ 1.5mm rust spot on the surface | Defective | Difference | C |
| ?3 | Bituminous paint | 30 | ?54.7 | There is a small amount of Φ 1.5 ~ 2mm rust spot on the surface | 1 ~ 2 grade | Difference | D |
| ?4 | The epoxy nitrate paint; | 90 | ?9.7 | Outward appearance does not have significant change | 2 grades | Normally | B |
| ?5 | The acrylic acid enamel paint that resists cold | 90 | ?7.8 | Outward appearance is normal, no significant change | 1 grade | Normally | A- |
| 6 | Acrylic polyurethane coating | 240 | ?4.7 | Gloss of film and surface appearance do not have significant change | 1 grade | Normally | A+ |
In the table:
T: be the ultrasonic vibration time; Ultrasonic time is an important parameter of estimating the organic coating barrier propterty.Ultrasonic time elder barrier propterty is good.Under the identical ultrasonic time, differentiate the coating protection performance by the size of N value, N is little, and the coating protection performance is good.
N: be the electrode probability of low-resistance region appearance.
The salt mist experiment result is by becoming to difference well: A, B, C, D level Four:
Slight loss of gloss of A:10 cycle does not have the point of embroidery;
Slight loss of gloss of B:6 cycle does not have the point of embroidery;
Moderate loss of gloss of C:3 cycle (or slight loss of gloss of 1 cycle) does not have the point of embroidery;
Moderate loss of gloss of D:1 cycle has the embroidery point.
Damp and hot experimental result is divided into normally, poor slightly, differ from three grades:
Normally: outward appearance is normal, no significant change;
Poor slightly: slight loss of gloss;
Difference: there is a spot of rust spot on the surface or many bubble points is arranged.
From table two as seen, ultrasonic time is short more, or under same ultrasonic time, the electrode probability N that low-resistance region occurs is big, then the coating protection poor performance, the coating protection performance is followed successively by by good extremely bad order: acrylic polyurethane coating, the acrylic acid enamel paint that resists cold, epoxy nitrate paint, phenolic enamel, synthetic enamel, bituminous paint.Adopt ultrasonic vibration to quicken application system corrosion process, reduce the relaxation time (t that corrosive medium arrives metal base surface
1), shorten relaxation time (t with the electro-chemical test means
1), can within 3～4 hours, differentiate the quality of different system barrier propterties usually, and conventional damp and hot, salt mist experiment needed usually more than ten cycles.As can be known from the above table, damp and hot, the salt mist experiment of its correspondence of system that ultrasonic acceleration time is long is in normal or A, B level, and damp and hot, the salt mist experiment of short its correspondence of system of ultrasonic acceleration time are in difference or C, D level.The result of gained after the ultrasonic vibration and normal experiment basically identical as a result is described.
Claims (3)
1, a kind of organic coating barrier propterty test accelerated method, it is characterized in that: before the organic coating barrier propterty being tested and assessed, with the application test piece or be coated with the multi-electrode test probe that installs and put into the ultrasonic vibration of 3～5%NaCl solution with conventional salt fog, damp and hot or electrochemical method.
2, a kind of organic coating barrier propterty test accelerated method according to claim 1, it is characterized in that: described ultrasonic power is not less than 50W, and the ultrasonic vibration frequency is not less than 20KHz.
3, a kind of organic coating barrier propterty test accelerated method according to claim 1 is characterized in that: under identical ultrasonic time, the size of the electrode probability N value that occurs by low-resistance region is differentiated the coating protection performance, and N is little, and the coating protection performance is good.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371700C (en) * | 2005-01-27 | 2008-02-27 | 湖南大学 | Organic paint coating anticorrosion performance testing method |
| CN101865814A (en) * | 2010-04-02 | 2010-10-20 | 上海工程技术大学 | Thermal barrier coating layer high-temperature resistance molten salt corrosion test method and device |
| CN101162223B (en) * | 2007-11-05 | 2010-12-15 | 中国科学院力学研究所 | Method for evaluating chrome plating layer binding ability |
| CN101482484B (en) * | 2009-01-21 | 2011-06-22 | 中国兵器工业第五九研究所 | Simulated acceleration test method for coating |
| CN102183457A (en) * | 2011-03-04 | 2011-09-14 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Method for testing adhesive force of coating or adhesive strength of adhesive layer |
| CN101346617B (en) * | 2005-12-27 | 2012-10-03 | 3M创新有限公司 | Detection system |
| CN103207139A (en) * | 2012-01-12 | 2013-07-17 | 中兴通讯股份有限公司 | Method for testing corrosion resistance of NCVM coating |
| CN103502794A (en) * | 2010-12-21 | 2014-01-08 | 涂层国外知识产权有限公司 | Process for evaluating corrosion resistance of coating |
| CN103518128A (en) * | 2010-12-21 | 2014-01-15 | 涂层国外知识产权有限公司 | Corrosion resistance evaluator |
| CN103534574A (en) * | 2010-12-21 | 2014-01-22 | 涂层国外知识产权有限公司 | Corrosion resistance evaluator |
| CN103534573A (en) * | 2010-12-21 | 2014-01-22 | 涂层国外知识产权有限公司 | Process of evaluating corrosion resistance |
| CN104062194A (en) * | 2013-03-18 | 2014-09-24 | 深圳市海洋王照明工程有限公司 | Testing method of lamp coating wear resistance |
| CN104297299A (en) * | 2014-09-10 | 2015-01-21 | 中昊晨光化工研究院有限公司 | Quality detection method of nonconductive internal coating of lining pipe with metal outer-wall |
| CN109668958A (en) * | 2018-12-10 | 2019-04-23 | 江苏天鹏电源有限公司 | Wall coating detection method in a kind of li battery shell |
| CN110542642A (en) * | 2018-05-29 | 2019-12-06 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Evaluation method for tropical ocean atmosphere adaptability of protective coating of printed circuit board |
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| CN100371700C (en) * | 2005-01-27 | 2008-02-27 | 湖南大学 | Organic paint coating anticorrosion performance testing method |
| CN101346617B (en) * | 2005-12-27 | 2012-10-03 | 3M创新有限公司 | Detection system |
| CN101162223B (en) * | 2007-11-05 | 2010-12-15 | 中国科学院力学研究所 | Method for evaluating chrome plating layer binding ability |
| CN101482484B (en) * | 2009-01-21 | 2011-06-22 | 中国兵器工业第五九研究所 | Simulated acceleration test method for coating |
| CN101865814A (en) * | 2010-04-02 | 2010-10-20 | 上海工程技术大学 | Thermal barrier coating layer high-temperature resistance molten salt corrosion test method and device |
| CN103534573A (en) * | 2010-12-21 | 2014-01-22 | 涂层国外知识产权有限公司 | Process of evaluating corrosion resistance |
| US9606076B2 (en) | 2010-12-21 | 2017-03-28 | Axalta Coating Systems Ip Co., Llc | Process for evaluating corrosion resistance of coating |
| CN103502794A (en) * | 2010-12-21 | 2014-01-08 | 涂层国外知识产权有限公司 | Process for evaluating corrosion resistance of coating |
| CN103518128A (en) * | 2010-12-21 | 2014-01-15 | 涂层国外知识产权有限公司 | Corrosion resistance evaluator |
| CN103534574A (en) * | 2010-12-21 | 2014-01-22 | 涂层国外知识产权有限公司 | Corrosion resistance evaluator |
| CN102183457A (en) * | 2011-03-04 | 2011-09-14 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Method for testing adhesive force of coating or adhesive strength of adhesive layer |
| CN103207139A (en) * | 2012-01-12 | 2013-07-17 | 中兴通讯股份有限公司 | Method for testing corrosion resistance of NCVM coating |
| CN104062194A (en) * | 2013-03-18 | 2014-09-24 | 深圳市海洋王照明工程有限公司 | Testing method of lamp coating wear resistance |
| CN104297299A (en) * | 2014-09-10 | 2015-01-21 | 中昊晨光化工研究院有限公司 | Quality detection method of nonconductive internal coating of lining pipe with metal outer-wall |
| CN110542642A (en) * | 2018-05-29 | 2019-12-06 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Evaluation method for tropical ocean atmosphere adaptability of protective coating of printed circuit board |
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