Some standard content:
ICS87.040
Request number: 7272—2000
Chemical Industry Standard of the People's Republic of China
HG/T3668—2000
Zinc Rich Primer
Published on 2000-06-05
Implemented on 2001-05-01
Published by the State Administration of Petroleum and Chemical IndustrybzxZ.net
HG/T3668—2000
This standard is equivalent to the Japanese Industrial Standard [IS K 5552-1991 zinc-rich primer. The main technical differences between this standard and JIS K5552-1991 are: the fourth part of the vocabulary, "heating residue" is changed to "non-volatile matter". This is in accordance with the provisions of GB/T5206.4 "Terms of Physical and Chemical Properties of Paints, Varnishes and Coatings" and the practice of my country. The technical indicators are exactly the same. "The determination of the content of metallic zinc in non-volatile matter is carried out in accordance with GB/T6890.3-1986 "Determination of the content of metallic zinc". The test conditions are carried out in accordance with GB9278-1988 "Adjustment of the state of coating samples and temperature and humidity of the test". According to the practice of my country's coatings industry, practical items are added. Appendix A of this standard Recorded for reminder.
This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee on Standardization of Paints and Pigments. The responsible drafting units of this standard: Shanghai Kailin Paint Factory, Changzhou Paint Chemical Research Institute of the Ministry of Chemical Industry. Participating drafting units of this standard: Tianze Dengta Paint Co., Ltd., Tianjin Dongguang Special Paint Factory, Xi'an Paint Factory, Chongqing Three Gorges Paint Co., Ltd., Wuhao Barun Paint Chemical Co., Ltd., Yangzhou Jinling Special Paint Factory, Guangzhou Guanghua Industry Co., Ltd., Shijiazhuang Paint Factory, Red Lion Paint International Co., Ltd. The main drafters of this standard: Lu Bocen, Xu Lili, Zhao Ling, Zhai Huitang, Ou Boxing, Jiang Jimin. 1 Scope
Chemical Industry Standards of the People's Republic of China
Zinc Rich Primer
Zinc Rich Primer
HG/T36682000
This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of zinc-rich primers. This standard applies to coatings made of zinc powder, alkyl silicate or epoxy resin and curing agent, additives and solvents as main raw materials. This coating is mainly used as rust prevention for steel substrates.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be subject to revision, and parties using this standard should explore the use of the following standards The possibility of the latest version, GB1250-1989 limit value expression method and determination method GB/T1728-1979 (89) Determination of drying time of paint film and putty film CB/T1732-1993 Determination of impact resistance of paint film GB/T1771-1991 Determination of neutral disk fog resistance of paints and varnishes (eq[S07253:1984) G33186-1982 (89) Samples of coating products (negISO1512:1974) GB/T6751-1986 Determination of volatile and non-volatile matter in paints and varnishes (cqYISO1515:1973) GB/T 6890.3—1986 Determination of metallic zinc content (eqvISO3549:1976) G38923—1088 Rust grade and rust removal grade of steel surface (eqvIS08501-1:1588) GB/T9271—1988 Standard test panel for paint and varnish (egvISO1511:1984) GB/T9276—1996 Test method for natural climate dew of coatings GB9278—1988 Conditioning of coating specimen state and temperature and humidity for test (eqvISO3270:1984) GB/T9750—1998 Packaging mark for coating products GB/T13491—1992 General rules for packaging of coating products 3 Product classification
Zinc-rich primers are divided into two types:
Type 1 inorganic zinc-rich primer is a two-component or three-component coating based on alkyl silicate. Type 2 organic zinc-rich primer is a two-component or three-component paint based on epoxy resin. 4 Requirements
Product performance should comply with the requirements of Table 1.
Approved by the State Petroleum and Chemical Industry Bureau on June 5, 2000, and implemented on May 1, 2001
State in the container
Workability
Drying time, hSurface dry
Real than 1
Appearance of polyester film
Applicable period, h
Impact resistance, cm
Salt spray resistance
Non-volatile matter, %"
Gold and zinc content in non-volatile matter, %
Qualification of epoxy resin
Weather resistance
5 Test method
5.1 Sampling
Carry out according to GB3186.
5.2 Test conditions
According to GB9278.
5. 3 Preparation of test specimens
HG/T3668—2000
Liquid material, no lumps after stirring and mixing, in a uniform state Powder material, should be in a small and uniform powder state
No obstacles to coating
Normal appearance of coating
168 h Resistance to salt spray
72 h Salt spray resistance
Contains epoxy resin
Natural exposure for 6 months, no blistering, no rust, no cracking, no peeling. The test base plate is treated according to the provisions of GB/T9271, and the dry paint film thickness is 15-20μm. 5.4 Component ratio
Perform according to the regulations of the product manufacturer.
5.5 State in the container
Evaluate the powder by visual observation.
For zinc powder slurry components, the container should be opened and stirred with a spatula or a stirrer. Sedimentation is allowed at the bottom of the container. If it is easy to mix evenly after stirring, it is evaluated as having no lumps after stirring and being in a uniform state. For liquid materials, the container should be opened and stirred with a spatula or a stirrer. There should be no lumps and it should be in a uniform state. 5. 6 Construction performance
In a size of 200 Ⅱm×100 mm steel plate or tinplate plate, spray with an air spray gun, dry film thickness 15~～20μm, if necessary, the sample can be diluted with the diluent specified in the product, the amount of static release agent should not exceed 20% of the content (understanding fraction, observe whether there are obstacles during the construction process to evaluate the construction performance.
5.7 Drying time
Instructions for use:
1 There is no such item in JISK5552.
2) It is called heating residual in JISK5552.
3) The temperature in JISK5552 is (20±1) and the relative humidity is (65±5)%. HG/T 3668—2000
Perform according to method B in GB/T1728—1979 (89). 5.8 Appearance of coating
The test plate is placed for 24 hours after coating. h Visually observe the coating film. If there is no sagging, blooming, cracking or falling of the coating film, the coating film appearance is considered normal.
5.9 Applicable period
5.9. 1 Apparatus and equipment
5.9. 1. 1 Balance: Sensitivity 1 g.
5.9.1.2 Container: Metal or glass bottle or polyaldehyde container with a capacity of about 300 ml and an inner diameter of (75 ± 5) mm. These containers are required to be well sealed:
5.9.1.3 Plate material: Steel plate or tinplate with a size of 200 mm × 100 mm. 5.9.1.4 Coating tool: Air spray gun or airless spray gun. 5.9.2 Operation and evaluation
5.9.2.1 Place the fully mixed sample into the container according to the proportion specified by the product and let it stand. 5.9.2.2 After the specified time is reached, the "state in the container", "applicability" and "appearance of the coating" shall be examined according to the methods specified in 5.5, 5.6 and 5.8. If the mixture is gelled or there are obstacles in the application route or the coating is abnormal, it is considered that the specified application period has not been reached. 5.10 Impact resistance
According to the provisions of GB/T1732.
5.11 Salt spray resistance
According to the provisions of GB/T1771. The sample is sandblasted and the rust removal level reaches Sa2.5 level specified in GB8923-1988. The thickness of the paint film is 20~～25 μm. The sample must be placed under the standard conditions specified in CB 9278 for 7 days, and the diagonal lines are cut on the test sample, and then the test is carried out. Type 1 is tested for 168 hours, and Type 2 is tested for 72 hours. After the test, the test sample is immediately taken out and rinsed with clean water.Place it indoors for 2 hours and visually inspect the coating. The coating within 10 mm around the test sample and within 3 mm on both sides of the diagonal through line on the coating are not evaluated. If there are no bubbles, peeling or rust on the coating of at least 2 of the 3 test samples, it is considered to be salt resistant.
5.12 Non-volatile matter
Perform according to GB/T6751. Mix the components of the product according to the proportion specified in the product manual and then conduct the test. 5.13 Metallic zinc in nonvolatile matter
5.13.1 Preparation of nonvolatile matter
5.13.1.1 Apparatus and instruments
5.13-1.1.1 Centrifuge; speed 3 000~15 000 r/min (rpm) 5.13.1.1.2 Test tube: bottom, stainless steel or glass, capacity 50 mT. 5.13.1.1.3 Analytical balance; sensitivity 0.1 mg. 5.13.1.2 Operation
5.13.1.2.1 Accurately weigh about 10 g of the sample mixed in proportion and place it in a test tube. 5.13.1.2.2 Add 20 mL of analytically pure 2-methyl-4-pentanone and acetone mixed solvent in a ratio of 1:1 (volume ratio), stir thoroughly with a glass slurry, flush the solids on the slurry back into the test tube with about 10 L of the mixed solvent, and add the mixed solvent to 4/5 of the test tube. 5.13.1.2.3 To prevent the solvent from evaporating, plug the test tube with a cork and place it in a centrifuge. Separate at a speed of 3000~15000r/min for 20~30 min.
5.13.1.2.4 Take out the upper layer of the test tube solution and use the precipitate for the test. 5.13.1.2.5 Repeat the above washing operation for 10 times, using 30 mL of the mixed solvent each time. 5.13.1.2.6 Immerse the bottom of the test tube in hot water to heat it, and gently tap it on a wooden board with 5~6 layers of cotton cloth until the precipitate falls off. 5.13-1.2.7
Place the test tube in an oven at (105±2)℃ for 2 h, take it out and place it in a desiccator to cool for 30 min. Accurately weigh the mass of the precipitate.
HG/T 3668—2000
5.13.1.3 The solvent-insoluble matter (B) in the mixture is calculated according to formula (1): R(%)=
Where: M——the mass of the precipitate
M, the mass of the sample, g
5.13.2 The content of metallic zinc in the solvent-insoluble matter 5.13.2.1 Determination
Perform the titration method specified in GB/T6890.3. 5.13.2.2 Calculation
The content of metallic zinc in the non-volatile matter (A) is calculated according to formula (2) M.
Wherein; B-solvent insoluble matter in the mixture, %, C-metallic zinc in the solvent insoluble matter, %, D-non-volatile matter of the mixture, %.
5.14 Qualitative characterization of epoxy resin
The qualitative characterization of epoxy resin is carried out by infrared spectroscopy. The solvent used is a mixture of toluene and acetone in a ratio of 1:1 (volume ratio). Compare the infrared absorption spectrum of the sample with the infrared absorption spectrum of epoxy resin in Figure 1, and then perform qualitative characterization by looking up the epoxy resin characteristics in Table 2.
被长.em
7.08.09.010.011,012,013,014.015016,0AN
4000 3600 3200 2800 2400 2000 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700波覆,m-1
Figure 1 Infrared absorption spectrum of epoxy resin (double A type) If the shape of the infrared absorption spectrum of the sample is similar to the infrared absorption spectrum of the epoxy resin in Figure 1, and all the characteristics ①) to @ shown in Table 2 can be seen in the spectrum of the sample, it is considered that it contains epoxy resin. 6
5.15 Weather resistance
Wave number + cm
Perform in accordance with GB/T9276.
5.15.1 Preparation of test specimens
HG/T 3668—2000
Table 2 Characteristic absorption of epoxy resin
Wavelength pm
OH contraction movement
CC stretching movement of benzene nucleus
Benzene-stretching movement (aromatic ether bond)
Symmetrical stretching movement of epoxy ring
Half-surface deformation movement of ortho hydrogen (hydrogen bond) of benzene ring Sandblasting was performed on steel plates (250 mm×150 mm×3.2 mm), and the rust removal level reached Sa2.5 level specified in CGB8923—1988. Then, air spray one coat of the sample on one side of the sandblasted steel plate to make the dry film thickness 15-20 μm. Apply two coats of the sample coating to the periphery and back of the test sample, with a time interval of more than 1 hour to avoid adverse effects on the test. Place under the standard conditions specified in GB 9278 for 7 days and then conduct the test.
The number of test samples is 3. One of them is preserved. 5.15.2 Start time and test time of the test 5.15.2.1 The start time of the test is April each year 5.15.2.2 The test time is 6 months.
5.15.3 Evaluation
At the end of the test, check the sample by visual observation. If both samples are free of rust, cracking, peeling and blistering, they are qualified. (Zinc salt or white rust is not an object of evaluation)
6 Inspection rules
All performance requirements listed in this standard are type inspection items. Among them, the state in the container, construction performance, drying time, coating appearance, impact resistance, and non-volatile matter should be inspected batch by batch. Under normal production conditions, type inspection should be carried out at least once a year. The delineation of the inspection results in this standard shall be carried out in accordance with the provisions of 5.2 of GB 1250. 7 Marking, packaging, transportation, storage
7.1 Marking
According to the provisions of GB/T 9750.
7.2 Packaging
According to the provisions of GB/T 13491.
7.3 Transportation
The product should be protected from exposure to drenching and sunlight during transportation, and should comply with the relevant regulations of the transportation department. 7.4 Storage
The product should be stored in a cool, ventilated, dry place, prevent direct sunlight, and be isolated from inflammatory sources and away from heat sources. Under the condition of the original sealed packaging, the storage period of type 1 is half a year from the date of production, and the storage period of type 2 is one year. If the storage period is exceeded, the product can be inspected according to the items specified in this standard. If the inspection is qualified, it can still be used. 3
In container
Workability
Drying time
Appearance of coating
Application period
Impact resistance
Salt mildew resistance
Volatile matter
Non-volatile matter
Gold and zinc in epoxy resin
Qualification
Cluster resistance
Test plate||t t||Sandblasted steel plate
or tinplate
Tinplate
Sandblasted steel plate
or tinplate
Tinplate
Sandblasted steel plate
Sandblasted lanthanum plate
A few notes on the inspection reference table
200×100
120×50×
(0.2~0.3)
200X100
120×50X
(0. 2 ~ 0. 3)
150×70X
250×150
HG/T3668-2000
(Appendix of Prompt)
Test Substitute Table
Test Reference Table
Test Plate
X-4-0-@
X-△50—0
0-41 Type
0-42 Type
Test Days, Days
+6 Months
1. Symbol Explanation: ×, Sample Sampling: O, Paint Film Preparation,, Evaluation, Placement, Heating, - Shared, Public, Other Operations.
2. The numbers in the Test Days column represent time, and the unit is hour (h). →, the test plate is
(Beijing) Xindengzi No. 039
People's Republic of China
Chemical Industry Standard
Zinc Primer
HG/T 3668-2000
Published by Chemical Industry Press
(No. 3 Lixinli, Qiyang District, Beijing, Postal Code 100029) Issuing Tel: (010) 64918013
http://cip.com,cn
Distributed by Beijing Publishing House of Xinhua Bookstore
Printed by Chemical Industry Press
Printed and bound by Chemical Industry Press
Format 880×1230 mm 1/16 printing sheet
Word count 16,000 words
First edition in June 2001 First printing in Beijing in June 2001 Book number: 155025·0060
Price: 8.00 yuan
All rights reserved. Violators will be prosecuted
If there are any missing pages, reversed pages or pages out of the book, the Publishing Department of this Publishing House will refund or replace them at its own expense.0089
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