Do your rail transit operations encounter the following challenges? Persistent yellow stains on vehicle bodies resist repeated cleaning; heavy oil contamination accumulates on undercarriages and wheelsets, dragging down work efficiency. There are also concerns that conventional cleaners may corrode metal surfaces and paint coatings, posing safety risks. Additionally, traditional detergents have limited cleaning performance and tend to leave residues. It’s high time to solve these tough problems.
Case Details
1. Problem (Core Cleaning Pain Points of Green Skin Passenger Trains)
Traditional general-purpose cleaners bring efficiency, material damage, environmental and operational troubles to railway depots cleaning green skin ordinary passenger trains, locomotives and carriages:
- Stubborn yellow rust spots & road film are hard to eliminate: Long-distance running exposes green train carriages to rain, iron oxide dust and road sediment; conventional alkaline cleaners take 5–10 minutes to dissolve yellow stains, requiring repeated scrubbing and heavy manual labor, slowing whole train turnaround efficiency.
- Heavy mixed oil contamination on bogies & undercarriage: Chassis, bearings, gearboxes accumulate thick brake dust, lubricating grease and diesel oil; common cleaners lack strong penetration, leaving oil film residue that affects later vehicle inspection and maintenance safety.
- Corrosion risk to train paint & metal substrates: Strong acid/alkali cleaners erode green exterior paint layers, causing fading, matte discoloration and water stain flower marks; they also corrode iron, steel and aluminum structural parts of carriages, shortening vehicle service life.
- High foam & residual defects: High-foam cleaners leave invisible chemical residue on windows, door frames and body gaps after rinsing; residual agent dries to form mottled marks, requiring secondary re-rinsing and wiping, increasing water & labor costs.
- Single-scene limited adaptability: Most cleaners only support automatic tunnel washing, failing manual long-handle brushing, local spot spray cleaning for hard-to-reach corners of green train car ends and window edges.
- Strict railway environmental compliance pressure: Many industrial cleaners contain nitrite, chromate and heavy metals; wastewater discharge fails railway depot environmental standards, bringing inspection fines and sewage treatment burden.
- Narrow time window for train cleaning: Green passenger trains have tight turnover schedules between trips; slow-acting cleaners extend cleaning cycles and delay vehicle scheduling.
Ruibao GRB-801C Neutral Train Body Cleaner is a low-foam water-based cleaning formula developed for EMUs, metro and green skin ordinary passenger trains. It integrates yellow spot removal, heavy oil degreasing and paint protection into one step, fully solving all exterior cleaning pain points of green skin rolling stock while meeting railway vehicle cleaning standards.
2. Material (Product Formula, Physical Parameters & Applicable Train Substrates)
2.1 Core Raw Material Composition (Official MSDS Document)
GRB-801C is a mild acidic water-based compound cleaner without heavy metals, nitrite or chromate:
- LMSC composite surfactant: 5 ~ 10%
- Citric acid (stain removal agent, CAS:77-92-9): 5 ~ 15%
- PH regulator: 3 ~ 5%
- Tween 20 wetting agent: 3 ~ 8%
- Chelating dispersant: 2 ~ 5%
- Deionized water (CAS:7732-18-5): Balanced remainder
Classified as non-dangerous goods under EU CLP Regulation (EC) No 1272/2008; non-flammable, low skin irritation, eco-friendly compliant formula for railway industry.
2.2 Applicable Rolling Stock & Body Materials
Target application: Green skin ordinary passenger trains, diesel locomotives, EMUs, subway & light rail carriages
Applicable substrates: Green exterior paint coating, steel carriage body, aluminum alloy window frames, bogie iron parts, glass windows, plastic exterior trim
2.3 Physical & Chemical Index Parameters (Lab Test, 25℃)
| Test Item |
Standard Index |
| Appearance |
Colorless transparent liquid |
| Odor |
Non-irritating mild smell |
| Specific Gravity |
1.04 ± 0.02 |
| Cleaning Power (60℃) |
≥90% |
| pH Value (3% aqueous solution) |
4 ~ 5 (mild weak acid) |
| Surface Tension |
≤35 mN/m |
| Rinsing Performance |
No visible cleaner residue after flushing |
| High-Temperature Stability |
Uniform, no stratification after 6h at (60±2)℃ |
| Low-Temperature Stability |
Uniform, no stratification after 24h at (-5±2)℃ |
| Refractive Index |
13 ~ 15 |
2.4 Product Safety Attributes (MSDS Specification)
Non-combustible with zero explosion risk; only mild skin degreasing occurs under prolonged direct contact; no toxic volatile irritants, suitable for long-term continuous workshop cleaning operation.
3. Soil (Composite Contaminants on Green Train Body Fully Removed)
GRB-801C features strong dispersion and penetration to strip all typical dirt on green skin passenger trains:
- Oxide yellow spots, road mud film, rainwater mineral stains on green paint surface
- Thick lubricating grease, diesel oil, brake dust mixed dirt on bogies, bearings and gearboxes
- Dust, insect glue residue, passenger footprints and hand sweat stains on windows & carriage side walls
- Metal powder, iron rust sediment accumulated on vehicle bottom and connecting gaps
- Light adhesive residues and atmospheric aging surface grime on exterior decorative strips
4. Cleaning Process (Standard Mass Production Workflow for Green Skin Train Cleaning)
4.1 Available Cleaning Equipment & Methods
- Automatic tunnel spray washing (for full green train body batch cleaning)
- Manual long-handle brush scrubbing (for car ends, window frames, chassis dead corners)
- Local high-pressure spray spot cleaning (for severe yellow stain & oil concentrated areas)
4.2 Standard Process Dilution & Time Parameters
- Mechanical automatic washing: 10% aqueous dilution
- Manual daily routine cleaning: 5x water dilution (20% concentration)
- Severe stubborn yellow spots & heavy oil: Use undiluted original liquid directly
- Operating Temperature: Normal ambient temperature, no heating required
- Reaction Time: 1–2 minutes for yellow stain decomposition; extend to 3–5 mins for thick oil dirt
4.3 Complete Post-Cleaning Workflow for Green Trains
Pre-rinse floating dust & mud → Spray / brush GRB-801C cleaning solution → Stand 1–5 mins for stain decomposition → High-pressure pure water full flushing → Air blow drying / natural air-dry inspection
4.4 On-Site Operation & Liquid Management Rules
- Avoid long-time skin contact; operators must wear full work uniforms, acid-resistant latex gloves and safety shoes; keep depot cleaning area well ventilated
- Cover all painted surfaces evenly with cleaning liquid, do not let liquid air-dry on green paint to prevent water marks
- Store sealed separately from strong acid, strong alkali and strong oxidants; avoid direct sunlight and high-temperature storage environments
- Waste cleaning liquid must be treated to meet railway depot wastewater discharge standards before drainage.
5. Test Standard (Railway Vehicle Cleaning Compliance & Physical Test Criteria)
- Physical Performance Standard: 3% aqueous solution tested at 25℃ fully meets official appearance, specific gravity, pH and ≥90% detergency indexes specified in MSDS & product manual
- Paint & Metal Protection Standard: No fading, matte discoloration, corrosion or pitting on green train exterior paint, steel and aluminum alloy parts after full cleaning cycle; original paint luster completely retained
- Stain Removal Efficiency Standard: Yellow oxide spots shrink and decompose within 1–2 mins; heavy oil & brake dust fully stripped without residual film after rinsing
- Low-Foam & Residue Standard: Ultra-low surface tension for easy full rinsing; no chemical residue, water flower marks or foggy stains on windows and body gaps
- Railway Environmental Compliance Standard: Free of nitrite, chromate, heavy metals and restricted hazardous substances, meets national rail vehicle wastewater emission regulations
- Safety Classification Standard: Non-dangerous goods, non-flammable, low occupational health hazard for long-shift cleaning staff.
6. Result (Field Cleaning Test Outcomes for Green Skin Passenger Trains)
- Ultra-Fast Yellow Spot Removal for Green Train Carriages: Citric acid chelating formula rapidly decomposes iron oxide yellow stains within 1–2 minutes, cutting repeated scrubbing labor and shortening single train cleaning cycle by over 40%
- Powerful Under-Chassis Heavy Oil Degreasing: Deep penetration dissolves mixed grease, brake dust and diesel dirt on bogies; no oil film residue left to ensure vehicle maintenance inspection safety
- Zero Residue Low-Foam Formula: Easy full rinsing without water marks on green paint and glass windows; eliminate secondary rework caused by residual cleaner mottling
- Multi-Scenario Flexible Adaptability: Supports automatic tunnel washing, manual brushing and local spot spray, covering full green train body, chassis, window and car end dead corner cleaning
- Zero Damage to Train Paint & Metal Parts: Mild weak-acid formula forms temporary protective dispersion layer during cleaning, completely avoiding green paint fading and metal corrosion
- Eco-Friendly Railway-Compliant Formula: No heavy metals or restricted toxic components, reduces sewage treatment operating costs and eliminates environmental inspection fines for depots
- Stable Long-Term Working Liquid Performance: Excellent high & low temperature stability without stratification; adjustable dilution ratio lowers overall chemical consumption cost for mass daily train cleaning.
7. Buyer Takeaway (Core Commercial Value for Railway Depots & Rolling Stock Maintenance Factories)
- Perfect Specialized Solution for Green Skin Ordinary Passenger Trains: Targeted formula solves green paint yellow spot and chassis heavy oil pain points unmatched by universal industrial cleaners
- Greatly Cut Labor & Time Cost: Fast 1–2 minute stain decomposition reduces manual repeated scrubbing, accelerates train turnover and improves depot vehicle scheduling efficiency
- Reduce Vehicle Maintenance Loss: Non-corrosive formula protects green exterior paint and metal structural parts, avoid repainting and component replacement costs caused by traditional corrosive cleaners
- Simplify Cleaning Material Inventory: Single product adapts to automatic tunnel washing and manual spot cleaning, no need to purchase separate oil removers and stain cleaners
- Eliminate Railway Environmental Compliance Risks: RoHS compliant formula without nitrite, chromate and heavy metals, smoothly pass national rail depot environmental audits
- Improve Workshop Staff Working Safety: Non-flammable mild low-irritation formula reduces occupational skin injury risks for long-shift train cleaning workers
- Complete Stable Supply System: 25kg / 200kg sealed plastic drums, 2-year shelf life under cool dry ventilated sealed storage; standardized sun/rain/heat-proof transportation for railway depot bulk procurement.
MSDS Safety Emergency Operation Guide
- Skin Contact: Immediately remove contaminated work clothes, rinse skin thoroughly with plenty of clean water for 5 mins; seek medical care if persistent dryness or irritation occurs
- Eye Splashing: Flush eyes with clean water or normal saline for 5 minutes, remove contact lenses before washing; consult doctors for continuous redness and stinging pain
- Inhalation Exposure: Move operator to well-ventilated fresh air area and rest
- Accidental Ingestion: Induce vomiting, rinse mouth and send to hospital for emergency medical treatment at once
- Fire Fighting Measures: The product itself is non-combustible; use foam or CO₂ fire extinguishers for burning plastic packaging barrels, prohibit 1211 fire extinguishers; stand on upwind side during fire disposal
- Liquid Leakage Handling: Collect spilled cleaning liquid into sealed containers to prevent inflow into sewers and drainage ditches; never mix polluted waste liquid with unused original stock liquid.
Storage & Transportation Specifications
- Packaging Specifications: 25kg plastic drum, 200kg plastic drum
- Shelf Life: 2 years under sealed, cool, dry and ventilated storage conditions
- Storage Requirements: Tightly seal barrel lids, store separately from strong acid, strong alkali and strong oxidants; avoid long-term direct sunlight and high-temperature environment
- Transportation Rules: Handle with care to prevent packaging barrel damage; shield products from sun exposure, rain and high temperature during transit
- Waste Packaging Disposal: Dispose empty plastic drums in accordance with national and local railway environmental protection laws, prohibit random stacking and dumping.
