Rail Transit Interior powder coating MT-A700 series
We are a manufacturer based in China, specializing in high-quality Rail Transit Interior powder coating MT-A700 series for industrial clients worldwide. Technical support and custom formulation available.
Category：powder Coating | Brand：MT
Introduction
The MT-A700 Series is designed for interior and exterior components used in rail transit applications. The product range includes polyester powder coatings for exterior parts and polyester-epoxy hybrid powder coatings for interior parts. Different formulations and finishes can be selected according to component requirements, appearance specifications, and service conditions.
Coating Characteristics
Good Leveling
Promotes a smooth, uniform finish when application conditions are properly controlled.
Weather & Salt Spray Resistance
Designed to provide weathering and corrosion resistance appropriate to the selected formulation.
Easy-Clean Surface
Supports routine cleaning and maintenance of coated rail transit components.
Application
Suitable for multi-structure interior and exterior components of rail transit vehicles, with coating chemistry selected according to the part’s location, appearance requirements, and operating environment.
Application Parameters
| Parameter | Recommended Setting |
|---|---|
| Atomizing Air Pressure | Approximately 0.7 bar |
| Primary Air Pressure | Approximately 0.7 bar |
| Electrostatic Spraying Voltage | 40–90 kV |
| Curing Conditions | 180°C for 15 minutes or 200°C for 10 minutes, based on workpiece temperature |
| Surface Preparation for Recoating | Grinding followed by air cleaning |
| Recoating Method | Reduce spraying voltage as appropriate for the component and application conditions |
Product Specifications
| Parameter | Specification |
|---|---|
| Chemical Type | Exterior parts: polyester; interior parts: polyester-epoxy hybrid |
| Appearance | Exterior parts: colors according to customer requirements; interior parts: options include metallic silver, wood-grain effects, and solid white finishes |
| Particle Size | Depends on product type and color |
| Gloss | Depends on the selected product |
| Specific Gravity | 1.2–1.8 g/cm³, depending on color |
| Storage Conditions | Keep sealed in a cool, dry place below 30°C |
| Shelf Life | 12 months when stored below 30°C under recommended conditions |
| Curing Conditions | 180°C for 15 minutes or 200°C for 10 minutes, based on workpiece temperature |
Physical & Chemical Performance
| Test Item | Test Equipment | Reported Requirement / Result | Test Standard |
|---|---|---|---|
| Adhesion | Single-edged knife and adhesive tape | No cracking reported | GB/T 9286; ISO 2409; ASTM D3359 |
| Impact Resistance | Impact tester | Reported values: 50 kg·cm (8 mm diameter); 2.5 Nm (16 mm diameter) | GB/T 1732; ASTM D2794; ISO 6272 |
| Coating Hardness | Hardness tester | ≥1H, as reported | GB/T 6739; ASTM D3363 |
| Alkali Resistance | 0.1 N sodium hydroxide solution | After 48 hours: no blistering, peeling, rust, or spots reported | GB/T 9274 |
| Acid Resistance | 0.1 N acid solution | After 24 hours: coating does not become softened or mushy, as reported | GB/T 9274 |
| Salt Spray Resistance | NSS salt spray chamber | ≥500 hours; reported rust/blister criterion below 2 mm | GB/T 1771; ASTM B117; ISO 7253 |
| Humidity Resistance | Constant temperature and humidity chamber | ≥500 hours; slight discoloration permitted, with no blistering, rust, or peeling reported | GB/T 1740; ISO 6270 |
| Weather Resistance | Accelerated weathering chamber | QUV-B313, 500 hours; reported rating: level 3 | GB/T 1865; ISO 11341 |
| Water Resistance | Hot-water test | After 20 cycles, some roughening permitted; no blistering reported | GB/T 1733; ASTM D2247 |
| Flame Spread | Third-party testing | Reported result: ISW35 | ASTM E162 |
| Smoke Density | Third-party testing | Reported values: DS(1.5)W100 and DS(4.0)W165 | ASTM E662 |
| Flammability Classification | Third-party testing | V-0, as reported | UL 94 |
The reported tests use 0.8 mm cold-rolled steel plates that have been degreased and derusted, with a coating thickness of 60–80 μm. Results may vary with gloss, substrate preparation, curing conditions, and test environment.
Environmental Requirements
The product is specified to exclude listed heavy metals, including lead, cadmium, mercury, and hexavalent chromium, and is intended to meet applicable RoHS 2.0 requirements. Compliance should be confirmed against the relevant product documentation and customer specifications.
Technical Support & Customization
Coating recommendations can be tailored to the component structure, substrate, color, gloss, spraying conditions, and required performance. Laboratory test results are provided for reference and do not guarantee identical performance under all service conditions.
Contact us with your rail transit component, substrate, finish requirements, and estimated order quantity to discuss MT-A700 series powder coatings and request a quotation.
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