Surface treatment technology for online equipment before repainting

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Hello, everyone. On-site, it’s common to encounter situations where the paint on operating equipment is damaged and needs to be repainted. To achieve good paint protection, the quality of surface preparation is crucial. However, the site conditions are different from those in a workshop, and proper working conditions cannot be provided; usually, manual rust removal methods such as using electric copper brushes or wire brushes are necessary. Please discuss the following issues: 1. Are there any new technologies that can be used for surface treatment of operating equipment without having to empty it of its contents? 2. Are there any new paints that require low surface treatment and can still provide good corrosion protection? 3. How much does a simple, incomplete surface treatment affect the lifespan of paint? 4. Are there any new paint anti-corrosion technologies? Welcome everyone to discuss; thank you!