This standard specifies the coating requirements and inspection methods for protective organic or organic-inorganic composite coatings on steel substrates that resist high-temperature oxidation corrosion in the temperature range of 80°C to 400°C. JB/T 10458-2004 Technical conditions for high-temperature oxidation-resistant coatings for mechanical equipment JB/T10458-2004 Standard download decompression password: www.bzxz.net
This standard specifies the coating requirements and inspection methods for protective organic or organic-inorganic composite coatings on steel substrates that resist high-temperature oxidation corrosion in the temperature range of 80°C to 400°C.

IC.S 25.220.70
Mechanical Industry Standard of the People's Republic of China
JH/T10458--2004
Specification of antioxidizing coatings at high-temperature formachineries
Published on 2004-06-17
Implementation on 2004-11-01
Published by the National Development and Reform Commission of the People's Republic of China Foreword
Normative referenced documents
Terms and definitions
Division of temperature zones
5 Substrate pretreatment and coating
5.1 Substrate pretreatment
5.2 Coating pretreatment
5.3 Coating
6 Grinding temperature coating test piece method
Appendix A
(Normative appendix) Requirements for hot and cold alternating test specimens
A.2 Acid test equipment
A.3 Test
A.4 Requirements for hot and cold alternating test layers,
Normative appendix: Endurance requirements
B.! High temperature discoloration
B.2 Requirements for heat resistance of coating
Table 4.1 Number of cycles of hot and cold alternating test in each temperature zoneTable 5.
Allowed color difference of economic layer test in each temperature zone
Requirements for heat resistance test after coating.
HTT10458-2004
This standard is determined for the first time,
This standard recommends Appendix A and Appendix B as normative appendices, and the standard is issued by the China Machinery Industry Union. Foreword
This standard is submitted by China Metal and Non-metallic Covering Standardization Technical Committee. JH/T:0458—2004
Standard drafting units: Materials Science and Engineering Institute, Hubei Shiyang Sihai Chemical Co., Ltd., Xi'an Tianyuan Chemical Co., Ltd.
Yun Tanzhun Shou and others
1Scope
Technical conditions for high temperature oxidation resistance coating of mechanical equipment JHT1045a—2004
This standard specifies the coating requirements and inspection methods for protective organic or organic-inorganic composite coatings on the surface of iron bodies against high temperature oxidation corrosion in the temperature range of 80-400℃. This standard is used for the high temperature oxidation protection layer of the iron surface of mechanical equipment. This standard is not applicable to products whose base material is deformed under high temperature.
2 Normative references
The clauses in the following examples become the clauses of this standard through the use of this standard. For all the referenced documents with a specified date, all the subsequent revisions (excluding the revised version) are not applicable to this standard. However, the parties who have reached an agreement with this standard are encouraged to study whether the latest versions of these documents can be used. For all the referenced documents without a specified date, their latest versions are applicable to this standard. G3/T1727 Method for preparation of paint film
GB/T1732 Method for determination of impact resistance of paint film (GB/1732-1993, 3egTOT4765:1973) GB/T[735 Method for determination of heat radiation of paint film
GD/T1764 Method for determination of thickness
GH1765
G8TS20
Method for determination of resistance to moisture and heat, resistance to wear and weathering (artificial acceleration) Preparation of paint and varnish before neutral salt calculation performance determination (GBT 1771-1991, qvISO7253:1984 Determination of adhesion of layers Faraday method GB/5210--1985, eS4624:1978 GE/T$264
Xu installation terminology
GT3/T9923 Surface rust and rust removal grade of steel before installation (GB/8g3-1988, net VIS0851-1:1988) Colorimetric test for continuous film (GB/T9286-1998.eg VISO2409:1992 GBr 9286
3 Glossary and Definitions
BT24 specifies the following terms and definitions and this standard shall apply. 3.1
Anti-oxidizing coatingsAn organic or inorganic composite layer that protects the surface of steel products from high temperature emulsification corrosion in a specified temperature range and for a specified period of time. 3.2
Temperature range
Design 3.3
High temperature oxidation corrosion is the product of long-term working temperature of steel and rapid oxidation of the steel surface. 4. Division of temperature zones
Based on different use conditions, the equipment can be divided into the following zones according to the high and normal use temperatures: Low value is the normal use temperature:
A temperature zone: 280'℃--5120C
H temperature zone: 120'-3 200;
[B/T1045B-2004
C temperature zone:>2~3400:
D temperature zone: 400℃～$700℃,
Will, some parts that often appear short-term high temperature, such as the vehicle air intake duct of the blood machine, start the work according to its high degree of work supervision zone 5 substrate pretreatment and coating
5.1 substrate pretreatment
The steel substrate to be coated The surface should be flat, and the substrate surface defects (such as pits, depressions, welds and deep mechanical scratches) should be minimized as much as possible. Filling putty should not be used for the installation of high-temperature chemical protection coatings. Therefore, if necessary, the surface should be machined to make it smooth during material preparation.
5.2 Pre-treatment before painting
The substrate should be sandblasted according to the provisions of GB/T8923 before installation, and the treatment level should reach Sa2.5 level. Workpieces that cannot be sandblasted can be manually polished, and the treatment level should reach St2 level. The treated surface must not have an oxide layer, rust, or contamination. Attached dust:
: The workability of manual polishing may reduce the performance of high-resistance coatings. 5.3 Painting
The entire painting process should be carried out in a dry environment. The paint manufacturer should provide a detailed painting process description. Including: 1) The time interval from the completion of pretreatment to the first coat of paint; 2) The time interval between each coat of paint; 3) The desired amount or film thickness of each coat of paint; 4) The time to complete all coatings; 5) The time from when the first coat is completely dry to when it is put into use; 6) Other necessary requirements: 6.1 Inspection method for high temperature resistant coating; the surface of the workpiece should be flat, and the color and surface defects of the coating should be recorded; 6.2 Arrange the workpiece according to GB/T1764. E) The dry film thickness of the coating. 6.3 Prepare coating test specimens (see GB/T1727J), and conduct coating impact resistance tests according to GB/T1732. 6.5 Determination of neutral salt spray resistance of coatings, prepare specimens according to GB/T1765, or directly take specimens from the workpiece: measure the thickness of the coating (see GB/T1764). Conduct neutral salt spray tests according to GB3/T177. Within the specified salt spray test cycle, there should be no rust, pooling or cracking within 5 mm of the edge of the specimen. Note: The salt spray test cycle is determined by the purchaser. 6.6 The heat resistance test of the coating shall be carried out according to the requirements of Appendix B: 6. The alternating hot and cold test of the coating shall be carried out according to the requirements of Appendix 4. Note: This article is used to test the bonding strength of the coating during use. 6.8 Acid resistance test
According to the weight ratio, 5 parts of 98 concentrated sulfuric acid and 95 parts of cane water. Under stirring conditions, add concentrated sulfuric acid slowly into the distilled water and prepare a 5% magnetic test solution. At room temperature, the coating will be sealed according to the requirements of Section 5. The specimen and workpiece are always in the test hammer, and the single-size is not in the 5% solution. Within the specified period, there should be no large cracking, falling off or evaporation. Note 1: The product should be tested within the specified period. If the test is not effective, the supplier should specify a period. Note 2: Non-S, the degrading layer is not required under the gas environment, and this test is not required. 3: The aging requires strong oxygen-free corrosion reagents. The operator should have necessary safety knowledge and strict protection. 6.9 Others: www.bzxz.net
JB/T10458-2004
For the needs of coating performance inspection, the damaged coating shall be repaired according to the design requirements by cutting the sample directly on the workpiece
For equipment outside the scope of this standard, the frequency of other inspections shall be determined by negotiation between the supply and demand parties 3B/110458-2064
A.1 Preparation of samples| |tt||Attachment A
【Recommended Record】
Hot and cold cross test requirements
Cold rolled sheet: 50mm×12mm×2mm, four pieces; according to the requirements of Chapter 5: Prepare four samples, three of which are for testing, and one is kept in the dryer for comparison 4.2 Test equipment
A blue wind heat drying set: It should provide a temperature of up to 300℃, suitable for A temperature zone and R temperature zone! See Chapter 4 for comparison: A high temperature furnace, which should be able to provide a temperature of 400℃, suitable for C source zone (No. 4 test) A.3 Test
The temperature of the wet oven reaches the specified temperature, and it is kept constant for 30min. Put the three samples into the furnace at the same time and keep them for 1h, then take them out and place them at room temperature, which is a test cycle: repeat. The test value is the upper limit of the temperature zone. It can also be agreed by the supply and demand parties that the number of test cycles should reach the number of cycles specified in Table A.1, or the supply and demand parties can agree. The three samples to be tested are compared with the preserved samples to check the discoloration of the coating. The discoloration should be within the allowable range of the product (see Table B!). The coating on a sample should not fall off, peel, bulge, or crack before it can be determined to be a hot and cold alternating test. 4. Requirements for hot and cold alternating test: Samples prepared under the use conditions or samples cut from the workpiece layer: cold alternating test according to the number of cold alternating test cycles specified in Table A.1 for each temperature zone.
Number of hot and cold alternating test cycles for each zone
Test temperature
Room ventilation -120
Relief -·200
Air volume ~4
Air group ~700
Number of test periods
B.1 Discoloration at high temperatures
Appendix B
(Normative appendix)
Requirements for thermal properties of agents
TE/T10458—2004
Prepare test pieces according to the requirements of Section 5 of GBT1727. Thermal properties of test pieces shall be carried out according to the requirements of GB/T1735: At a certain temperature, after 1 test, the recommended discoloration range is shown in Table B.1. The allowable color difference after the coating test in each temperature zone is as follows: 1. Test temperature: B, 2. Coating heat resistance protection requirements: Experimental time: Color change: Slight yellowing: Ordinary yellowing: Medium yellowing: Metal aluminum gloss protection: Slight yellowing: Metal pot powder: Moderate strain: Thermal test is carried out according to the requirements of CBT1735. The test is carried out under the conditions of specified temperature, time and continuous operation: the result shall not be lower than the requirements specified in Table 2.
Application area
Table 1.2 Requirements for coating after heat resistance test
Test temperature
Test time
Deep coating requirements
No powdering, falling off, or bottom
No blooming, blistering, delamination, or roundness
No blistering or bottom
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