JB/T 5673-1991 General technical requirements for painting of agricultural and forestry tractors and implements
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T5673-91
Painting of agricultural and forestry tractors and implements
General Technical Conditions
Published on September 13, 1991
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Painting of agricultural and forestry tractors and implements
General Technical Conditions
Subject Content and Scope of Application
JB/T567391
This standard specifies the marking method, classification, technical requirements and inspection methods for paint coatings of agricultural and forestry tractors and implements. This standard applies to the paint coatings of various models of agricultural and forestry tractors and implements, but does not apply to the paint coatings of the accompanying instruments and meter products. Reference standards
GB1731
GB1732
GB1733
GB1735
GB1740
GB1743
GB1763
GB1764
GB1767
GB1768
GB17 71
GB6807| |tt||ZBT60005
ZBT60006
JB/Z236
Determination of paint film flexibility
Determination of paint film impact resistance
Determination of paint film water resistance
Determination of paint film heat resistance
Determination of paint film moisture and heat resistance
Determination of paint film gloss
Determination of paint film resistance to chemical reagents
Paint film thickness Determination method
Determination method for weather resistance of paint film
Determination method for abrasion resistance of paint film
Determination method for salt spray resistance of paint film
Technical conditions for phosphating treatment of steel workpieces before painting Visual evaluation method for paint film of agricultural and forestry tractors and machinery Method for determination of adhesion performance of paint film of agricultural and forestry tractors and machinery - Press cutting method Test method for degreasing degree of steel workpieces before painting Marking and classification of paint coatings
The marking method of paint coatings is stipulated as follows: TQ-口-口-□
Topcoat code, represented by M
Primer code, represented by D
Characteristic number, represented by Arabic numerals or pinyin letters Classification number, represented by Arabic numerals
Paint (T) Paint (Q) code
3.2 Classification
According to the different working environment conditions and painting quality requirements, the paint coatings of agricultural and forestry tractors and machinery are divided into five categories and fourteen types, as shown in Table 1. Approved by the Ministry of Machinery and Electronics Industry on September 13, 1991 and implemented on July 1, 1992
Classification name, class number, characteristic number
High-quality weather-resistant coating
Ordinary weather-resistant coating
3.3 Marking example
TQ-1-1-××
JB/T567391
Marking and classification of paint coatings
Use environment
Tropical, temperate and other high-quality decorative protective
TQ-1-2-××
TQ1-3-××
TQ2-1××
TQ-2-2-××
TQ-23××
TQ3SJX X
TQ3NY××
TQ3-FX×
TQ4SM××
TQ4SC X ×
TQ5JY-X X
TQ5R × ×
TQ-5-M-
Temperate zone
Tropical zone
Wet tropical zone, temperate zone, etc.
Temperate zone
Wet tropical zone
Decorative protective coating
Decorative protective coating
High-quality protective coating
Protective coating
Protective coating
Acid-resistant or alkali-resistant coating
Pesticide-resistant coating|| tt||Fertilizer resistant coating
Water-resistant and wear-resistant coating
Water-resistant and moisture-resistant coating
Motor oil resistant coating
Heat-resistant coating
Wood coating
Decorative protective coatings that require primer and topcoat and are suitable for temperate regions are marked as: TQ-1-2-DMJB/T5673
Motor oil resistant coatings that require primer are marked as: TQ5-JY-DJB/T5673||t t||4 Technical requirements
4.1 General requirements
Application examples
Hood assembly, fender, cab and other parts with high requirements for decorative protection
General exposed surfaces
Batteries, etc.
Surfaces of plant protection machinery in contact with pesticides
Surfaces of fertilizer boxes in contact with fertilizers
Paddy field machinery, irrigation and drainage machinery, washing baths and other machinery in contact with water, soil or in wet areas Used parts and radiators, etc.
Parts that often come into contact with oil, such as the inner surface of the gearbox, etc.
Exhaust pipe parts, high-temperature fast dryer mixed flow chamber, etc.
Trailer wooden fences, mower pull rods, harvester width plates, rice transplanter bottom plates, etc.
4.1.1 All parts must be surface treated before painting, and the surface after treatment should be free of stains, rust, oxide scale, sand, welding slag, acid and alkali residues.
The phosphating treatment of steel workpieces that must be phosphated before painting should comply with the relevant provisions of GB6807. 4.1.2
For high-quality weather-resistant coatings, the surface of parts should be phosphated before painting. 4.1.3The temperature and humidity of the painting construction site should be adapted to the construction conditions of the coating, and the construction environment should comply with the relevant provisions of the National Environmental Protection Law.
4.1.4 The boundary between two colors of paint must be smooth and obvious, and there must be no interlacing. 4.1.5 Before the product leaves the factory, the paint coating must not have defects such as bruises, exposed bottom, peeling, stickiness, brittle cracks, bubbles, discoloration, etc. 4.2 Quality requirements
The quality indicators of various paint coatings are specified in Table 2. 2
TQ-1-1-××
TQ-12-××
TQ1-3-××
TQ--2--1
TQ-2-2-××
TQ-2-3-××
JB/T567391
Table 2 Quality indicators of paint coatings
Main quality indicators
a. Appearance of paint film: plump, smooth, evenly colored, no orange peel allowed. Paint film gloss not less than 90%; b. Paint film thickness: primer layer not less than 15uμm, topcoat layer not less than 40um, total thickness not less than 55μm; Mechanical strength: impact strength 4.9Nm, flexibility 1mm, hardness not less than 2H, adhesion 1~III grade; C
d. Weather resistance: within one and a half years after leaving the factory, the paint film should be complete, not fall off, not blister, not crack; e, Water resistance: no blistering after 12 cycles; f. Salt water resistance: no blistering after 8 cycles; g. Salt spray resistance: no blistering after 10 cyclesa. Paint film appearance: smooth and flat, uniform color, no paint defects allowed, paint film gloss not less than 85%; b. Paint film thickness: primer layer not less than 15um, topcoat layer not less than 35um, total thickness not less than 50μm; Mechanical strength: impact strength 4.9Nm, flexibility 1mm, hardness not less than HB, adhesion IⅡI~Ⅲ level; C.
d Resistance: within one and a half years after leaving the factory, the paint film should be complete, not fall off, not bubble, and not crack; e. Water resistance: no bubble after 10 cycles; f. Salt water resistance: no bubble after 5 cycles a. Paint film appearance: paint film thickness and weather resistance are the same as TQ-1-2. The gloss of the paint film is not less than 80%; b. Mechanical strength: impact strength is not less than 3.92Nm, flexibility is 2mm, hardness is not less than H, adhesion is grade II I; c. Water resistance: no blistering after 12 cycles; d. Salt water spray: no blistering after 6 cycles; e. Salt spray resistance: no blistering after 8 cycles a. Appearance of the paint film: uniform color, no exposure of primer, no paint defects; b. Total thickness of the paint film: not less than 45um;
c. Mechanical strength: the same as TQ-1-1; ||tt| |d. Weather resistance: Same as TQ-1-2:
e. Water resistance: No blistering after 10 cycles;f. Salt spray resistance: No blistering after 6 cycles:g. Engine oil resistance: No blistering after 2 cyclesa. Appearance and engine oil resistance of the paint film are the same as TQ-2-1;b. Total thickness of the paint film: not less than 40μm;
Weather resistance: Within 9 months after leaving the factory, the paint film should be intact, without falling off, blistering or cracking;C
d. Mechanical strength and water resistance: Same as TQ-1-2. a.Paint film appearance and oil resistance: the same as TQ-2-1; Weather resistance: the same as TQ-2-2; b. Total thickness of paint film: not less than 40μm;
Mechanical strength: impact strength not less than 3.92Nm, flexibility 2mm, hardness not less than H, adhesion not less than grade;
d. Water resistance: no blistering after 10 cycles: e. Salt water resistance: no blistering after 3 cycles; f. Salt spray resistance: no blistering after 2 cycles 3
TQ-3-SJ-××
TQ3-NY-××
TQ-3F-××
TQ-4-SM-××
TQ-4-SC~× ×
TQ-5-JY-××
TQ~5-R~××
TQ-5-M-××
Inspection method
JB/T567391
Continued Table 2
Main quality indicators
Appearance of paint film: flat and smooth, uniform, without pinholes, without pitting, and no paint defects are allowed; a.
Total thickness of paint film: not less than 40μm;
c. Acid resistance (acid-resistant coating): the paint film should not change after 3 cycles; Resistance (alkali-resistant coating): the paint film should not change after 3 cycles d.
Appearance of paint film: flat and smooth, uniform, No pinholes, no pitting, no paint defects are allowed: Total thickness of paint film: not less than 75μm;
c. Pesticide resistance: qualified
8. Paint film appearance: flat and smooth, no paint defects are allowed;b. Total thickness of paint film: not less than 50um;
c. Fertilizer resistance: no obvious change in paint film for 24 hoursa. Paint film appearance: uniform, no paint defects are allowed;b. Total thickness of paint film: not less than 70um;
c. Mechanical strength: impact strength 4.9N·m, flexibility 1mm, adhesion not less than grade II;d. Water resistance: no blistering after 12 cycles;e. Abrasion resistance: load 12.25N, grinding and rotation 500 times, the weight loss of the paint film should not exceed 40mga. Appearance of the paint film: flat and uniform, no paint defects are allowed; b. Total thickness of the speed film: not less than 40μm;
C. Mechanical strength: the same as TQ-4-SM;
d. Water resistance: no blistering after 12 cyclesa. Appearance of the paint film: uniform, no paint defects are allowed; b. Total thickness of the paint film: not less than 15um;
C. Mechanical strength impact strength, flexibility, hardness, adhesion must meet the indicators of the selected paint; d. Oil resistance: no change after 40 cyclesa. Appearance of the paint film: flat and uniform, no paint defects are allowed; b. Total thickness of the paint film: 5 0±5um;
c. Heat resistance of paint film: 500±10℃ heated for 24h, the paint film should be complete, and it is allowed to darken when changing light; d. Salt spray resistance of paint film after heating: 500±10℃ heated for 24h, 4 cycles of salt spray resistance test, the paint film should be complete, no rust, no blister;
e. Anti-traceability of paint film after heating: 500±10℃ heated for 24h, 4 cycles of humidity and heat resistance test, the paint film should be complete, no rust, no blister
a. Appearance of paint film: flat and uniform, no paint defects are allowed; b. Total thickness of paint film: not less than 30μm
When inspecting the various quality indicators of the coating, it should be directly tested on the parts as much as possible. When inspecting with a sample, the sample should be prepared under the same conditions as the actual construction, and the same material as the actual parts substrate should be selected. : See Table 3 for inspection items and methods.
JB/T567391
Appendix AbZxz.net
Dynamic corrosion test method for paint film resistance to pesticides (supplement)
A1 This method is formulated with the medicine box as the test object. For other coatings that come into contact with pesticides, this method can be used as a reference for determination. This method is a dynamic accelerated corrosion test method that simulates actual field conditions. A2 Test method: After the medicine box is leak-checked, the pesticide medium is filled to the water level, the medicine box is sealed and placed on the rack in the dynamic corrosion test box. In order to simulate field conditions, the medicine box is often swung so that the liquid medicine impacts the inner wall of the medicine box. The dynamic test machine runs for 15 minutes and then remains stationary for 15 minutes. During the movement, the medicine box swings back and forth with the rack, with a swing frequency of 0.5Hz and an amplitude of about 5°, which is carried out continuously day and night. Check the inner wall coating of the medicine box every 7 days and replace the pesticide at the same time.
A3 medium: select 2~3 kinds of each of the four types according to a. different types of agents; b. different uses; c. different compositions; d. different pH values, and the concentration is 10 times the user's commonly used concentration. In order to simulate user use, pesticides should be replaced alternately and corroded alternately. For example: rice blast emulsion → trichlorfon aqueous solution → insecticide aqueous solution → + dichlorvos emulsion.A4
Medium temperature: continuous constant temperature 40±2℃.
Corrosion time: 1000h. If perforation occurs due to severe corrosion, the test is stopped. The pesticide corrosion resistance level is shown in Table A1.
Unqualified
No gloss loss or slight gloss loss, no discoloration or slight discoloration; blistering, wrinkling or paint film shedding is not allowed; powdering, cracking, and rusting are not allowed
Obvious gloss loss, obvious discoloration, and microbubbles. The area of microbubbles is less than 30%, the area of local small bubbles is less than 4%, the area of medium bubbles is less than 1%, the area of paint film wrinkles is less than 30%, but there is no shedding phenomenon, slight powdering but no cracking, there are several rust spots, the diameter of the rust spots is less than 0.5mm
Severe gloss loss, severe discoloration, obvious blistering. The area of microbubbles is more than 30%, the area of small bubbles is more than 5%, the area of medium bubbles is more than 2%, and large bubbles appear. The area of paint film wrinkles is greater than 30% and the paint film falls off. Obviously powdering and cracking. The area of rust spots is more than 2%, and rust spots or perforations appear. Note: ① Calculation of bubble area: Divide the test surface into 100 equal parts, and 1% of the area has a small bubble, which is calculated as 1%. ②Bubble grade assessment: Microbubbles -
- those with a diameter visible under a 4x magnifying glass;
Small bubbles - those with a diameter below 0.5mm;
diameter 0.6--1mm;
Large bubbles - those with a diameter above 1.1mm.
Inspection items
Degreasing before painting
Rust removal before painting
Phosphating before painting
Appearance of paint film
Thickness of paint film
Gloss of paint film
Adhesion of paint film
Hardness of paint film
Impact strength of paint film
Flexibility of paint film
Resistance to moisture and heat of paint film
Resistance to salt spray of paint film
Weather resistance of paint film
Resistance to salt water of paint film
Water resistance of paint film
Abrasion resistance of paint film
Heat resistance of paint film
Motor oil resistance of paint film
Acid resistance of paint film
Alkali resistance of paint film
Pesticide resistance of paint film
Fertilizer resistance of paint film
JB/T567391
Inspection items and methods of paint coating
Perform in accordance with the provisions of JB/Z236
Visual inspection
Perform in accordance with the provisions of GB6807
Perform in accordance with the provisions of ZBT60005
Perform in accordance with the provisions of GB1764
Perform in accordance with the provisions of GB1743
Perform in accordance with the provisions of ZBT60006
According to the method for testing the hardness of paint films on agricultural and forestry tractors and machinery - aluminum pen test method, follow the provisions of GB1732
follow the provisions of GB1731
follow the provisions of GB1740
follow the provisions of GB1771
follow the provisions of GB1767
follow the provisions of GB1763 (25°C)
follow the provisions of GB1733 (25°C)
follow the provisions of GB1768
follow the provisions of GB1735
immerse the painted parts or samples in 80± 1℃ HC-14 diesel engine lubricating oil, 24h circulation
According to the provisions of GB1763
Medium: 40% chemically pure sulfuric acid
According to the provisions of GB1763
Medium: 40% chemically pure sodium hydroxide
According to the provisions of Appendix A (supplement)
According to the provisions of Appendix B (supplement)
JB/T567391
Appendix B
Determination of paint film resistance to fertilizer
(supplement)
B1 This method is applicable to the determination of paint film resistance to fertilizer. B2 Materials and instruments
Test rod: as shown in Figure B1
Test rod material: the same as the tested parts, all R, 6.3um glass tank (with cover)
Thermostatic box
B3 Fertilizer solution
According to the type of fertilizer used in the paint film (such as urea, ammonium dihydrogen carbonate, potassium carbonate, etc.), use distilled water or deionized water to prepare a solution with a fertilizer concentration of 10%, and place it in glass spirit. B4 Sample preparation
Paint the test rod according to the actual construction conditions to make a sample. B5 Test method
Take at least three samples, suspend and immerse two-thirds of each sample in the fertilizer solution in the glass tank with a cover, and place it in a thermostatic box with a constant temperature of 40±1℃.
B6 Inspection method
Inspect the samples immersed in the fertilizer solution every 24h. During the inspection, take out the sample, rinse it with water, absorb the water with filter paper, and observe whether the paint film has changed. It is qualified if no less than 100 samples meet the specified quality indicators. Additional Notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Chinese Academy of Agricultural Mechanization Sciences. This standard was drafted by the Institute of Technology of the Chinese Academy of Agricultural Mechanization Sciences and Yuncheng Tractor Factory. The main drafters of this standard are Wang Guangyang and Jia Rude. 7
People's Republic of China
Mechanical Industry Standard
Painting of agricultural and forestry tractors and implements
General Technical Conditions
JB/T5673-91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Format 880×12301/16 Printing Sheet 3/4 Number of Words 14000 First Edition June 1992 Second Printing June 1992 Number of Prints 00.0011000 Price RMB 1.50
No. 0542
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