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维修施工前处理

Time of issue:2021-08-05 17:02:00
Steel pretreatment



When the steel structure is repaired, the surface generally has serious corrosion, and it cannot be thoroughly sandblasted or shot blasted like a new construction project. It is often only possible to perform simple polishing and cleaning. The rust cannot be completely removed, and the surface is affected during construction. The environmental impact is relatively large, leading to adhesion problems and the coating failure.
Zindn can provide suitable solutions for the pre-treatment of steel during repairs.

Rust treatment
Steel materials need to be sandblasted or polished before they can be painted. When sandblasting and polishing, problems such as time-consuming, high noise, high cost, unclean and incomplete substrate treatment, especially maintenance and rust removal, will occur. The pre-treatment is very troublesome, and the rust coating scheme is required at this time.

Zindn is a new generation of water-based rust conversion coating, which dries quickly and has low VOC content. It converts the rust layer on the surface of steel into a protective film that is tightly combined with steel and protects the steel substrate at room temperature. It can completely solve the problem of rust removal during maintenance and construction.
   
Location
Protection plan
Road number
Thickness (μm)
C5 corrosion environment steel structure repair (difficult to remove rust surface)
Surface pretreatment
Remove loose rust and oil stains
Water-based rust conversion primer
1
30
Epoxy anti-rust primer
1
80
Epoxy Mica Intermediate Paint
2
160
Fluorocarbon topcoat/polysiloxane topcoat
2
80
 
Low surface treatment



In general, the higher the surface treatment level, the higher the adhesion of the paint film to the substrate. However, in reality, the surface treatment is often unsatisfactory, failing to meet the requirements of sandblasting Sa2.5 and roughness. At the same time, environmental conditions will also affect adhesion, and high relative air humidity will cause the following problems:

①Condensation on the surface of the substrate increases; ②Condensation leads to flash rust, causing coating failure; ③The condensed water vapor generated on the surface of the substrate may cause blistering and delamination of the paint film;
For the possible coating failure problems of the above substrate conditions, Zinc Shield has introduced a low surface treatment primer coating system program. The low surface treatment primer of this program has low requirements for the treatment of the substrate, and the wetness of the substrate surface Insensitive to air, it can effectively solve the problems that plague customers.

   
Location
Protection plan
Road number
Thickness(μm)
Surfaces that cannot be thoroughly rusted and cleaned
Surface pretreatment
Polished to St3 level
Low surface treatment epoxy primer
1
80
Epoxy Mica Intermediate Paint
2
160
Fluorocarbon topcoat/polysiloxane topcoat
2
80
 
 

 

 

维修施工流程

Time of issue:2021-08-05 17:02:10
Zindn maintenance construction qualification

资质

 
 
Zindn maintenance and construction technical service personnel qualification

 

NACE认证
NAce认证
 
 
Maintenance engineering business process
 
 
Detailed maintenance engineering business process
 
 
 
一、Project admission inspection
① Staff formation
涂层现状缺陷
业务人员
涂层检查
 
Construction technician
Technical staff
Coating inspection technician
②Corrosion environment confirmation
湿度
污染物
temperature humidity
Acid-base environment
Pollutants
③Layer corrosion detection
参考标准
涂层现状缺陷
According to the standard ISO 4628 (1-9); GB/T 30789 (1-9)
Coating status defects
(Blistering, peeling, aging, cracking, chalking, rusting)
 
 
     

二、The inspection team proposes
Preliminary anti-corrosion and implementation plan

④Anti-corrosion plan analysis
     
涂层腐蚀
Corrosion environment analysis
Analysis of coating corrosion
Budget input
施工周期
施工周期
   
Business staff coordination
Safety and environmental protection
Construction Conditions
 
 
     
三、Program communication and adjustment
⑤Program communication and adjustment
     
技术研发中心
技术研发中心
技术研发中心
Technology R&D Center
Production logistics center
Inspection team
 
 
     
四、Confirm plan and admission
⑥Admission and process control
     
技术研发中心
技术研发中心
技术研发中心
Construction team
Process quality control technician
Security and coordination
 
施工指南

Wuxi Huadong Zindn Technology Co., LTD

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