钢结构桥梁

Time of issue:2021-08-03 10:29:41

The necessity of bridge steel structure anticorrosion

Steel structure bridges have the characteristics of large span, strong carrying capacity, short construction period and long service life, etc., and are widely adopted by countries all over the world.
Steel structure bridges provide convenience for human beings, but the environment such as heat and humidity, acid rain, salt spray, industrial atmosphere, marine atmosphere, etc. is subject to corrosion. If there is no effective anti-corrosion method to protect the steel structure, the service life of the bridge will be long. Decrease in amplitude or even scrapped ahead of schedule.
The zinc shield cold spray zinc anticorrosive coating system has excellent salt spray resistance, acid and alkali resistance and other corrosion resistance and excellent weather resistance, which can effectively solve the problem of corrosion prevention of steel structure bridges. The recoating cycle can reach more than 20 years, effectively extending maintenance The interval period reduces the cost of coating protection during the entire life cycle of the bridge.

Reference System for Coating of Steel Girder Bridges＞＞

Examples of painted parts	Protection plan	Road number	Design thickness(μm)	Upper limit of spraying film thickness(μm)
Outer surface of steel structure (except steel bridge deck with paved)	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Alcohol-soluble inorganic zinc silicate workshop primer	1	20	--
	Secondary surface treatment	Sandblasted to Sa2.5 level, surface roughness is Rz 50～80µm
	Cold spray zinc	2	80	≤120
	Cold spray zinc sealant	2	100	≤150
	Fluorocarbon topcoat/polysiloxane topcoat (factory)	1	40	≤60
	Fluorocarbon topcoat/polysiloxane topcoat (on-site)	1	40	≤60
Inner surface of steel box girder	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Alcohol-soluble inorganic zinc silicate workshop primer	1	20	--
	Secondary surface treatment	Sandblasted to Sa2.5 level, surface roughness is Rz 50～80µm
	Cold spray zinc	2	80	≤150
Steel bridge deck (paving area)	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Alcohol-soluble inorganic zinc silicate workshop primer	1	20	--
	Secondary surface treatment	Sandblasted to Sa2.5 level, surface roughness is Rz 50～80µm
	Epoxy zinc-rich primer	2	80	--
U-shaped rib inner surface	Surface pretreatment	Sandblasted to Sa2.5 level, surface roughness is Rz 50～80µm
U-shaped rib inner surface	Alcohol-soluble inorganic zinc silicate workshop primer	1	30	--
Outer surface of steel guardrail and steel accessory structure	Surface pretreatment	Shot blasting and rust removal reach Sa2.5 level
	Alcohol-soluble inorganic zinc silicate workshop primer	1	20	--
	Secondary surface treatment	Sandblasted to Sa2.5 level, surface roughness is Rz 50～80µm
	Cold spray zinc	2	60	≤120
	Cold spray zinc sealant	2	80	≤150
	Fluorocarbon topcoat/polysiloxane topcoat (factory)	1	30	≤60
	Fluorocarbon topcoat/polysiloxane topcoat (on-site)	1	30	≤60
Steel concrete bonding surface	Surface pretreatment	Shot blasting and rust removal reach Sa2.5 level
	Alcohol-soluble inorganic zinc silicate workshop primer	1	20	--
	Secondary surface treatment	Sandblasted to Sa2.5 level, surface roughness is Rz 50～80µm
	Cold spray zinc	2	80	≤150

Reference System for Repair and Painting of Steel Beam Structures＞＞

Examples of painted parts	Protection plan	Road number	thickness(μm)
Steel beam structure	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Cold spray zinc primer	1	80-120
	Epoxy Mica Intermediate Paint	1	60-80
	Fluorocarbon topcoat	1	80

Steel structure bridge painting case

行业解决方案

Nansha Port Railway across Hongqilishui Road Extra Large Bridge

Bridge steel structure anti-corrosion engineering case: Nansha Port Railway crosses the Hongqili Waterway Extra Large Bridge, known as the "world's first span"

Ningbo Chunxiao Bridge

Bridge steel structure anti-corrosion engineering case: Ningbo Chunxiao Bridge

Zhuhai Hengqin Second Bridge

Bridge steel structure anti-corrosion engineering case: Zhuhai Hengqin Second Bridge

Steel structure bridge painting case

Bridge steel structure anti-corrosion engineering case: Nansha Port Railway crosses the Hongqili Waterway Extra Large Bridge, known as the "world's first span"

Nansha Port Railway across Hongqilishui Road Extra Large Bridge
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Bridge steel structure anti-corrosion engineering case: Nansha Port Railway crosses the Hongqili Waterway Extra Large Bridge, known as the "world's first span"
Bridge steel structure anti-corrosion engineering case: Ningbo Chunxiao Bridge

Ningbo Chunxiao Bridge
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Bridge steel structure anti-corrosion engineering case: Ningbo Chunxiao Bridge
Bridge steel structure anti-corrosion engineering case: Zhuhai Hengqin Second Bridge

Zhuhai Hengqin Second Bridge
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Bridge steel structure anti-corrosion engineering case: Zhuhai Hengqin Second Bridge

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混凝土桥梁

Time of issue:2021-08-03 10:30:19

The necessity of concrete bridge anticorrosion

Reference System for Bridge Concrete Coating＞＞

Examples of painted parts	Protection plan	Road number	thickness(μm)
Urban concrete viaduct surface	Surface pretreatment	High-pressure fresh water flushing, etc.
	Water-based acrylic primer	1	50
	Grassroots defect repair	Scrape putty to repair defects
	Water-based high-performance stain-resistant topcoat	2	100
Port concrete or saline areas, northern areas where deicing salt is sprayed	Surface pretreatment	Clean the surface of the substrate, and all processed surfaces should be free of water, dirt, dust, oil and other contaminants
	Silane impregnating paint	2	About 300 g/square
Concrete bridge (long-acting type)	Surface pretreatment	High-pressure fresh water flushing, etc.
	Waterborne epoxy sealing primer	1	50
	Grassroots defect repair	Scrape putty to repair defects
	Waterborne epoxy intermediate paint	2	120
	Waterborne polyurethane topcoat	2	80

Reference System for Repairing and Painting of Bridge Concrete＞＞

Examples of painted parts	Protection plan	Road number	thickness(μm)
Bridge concrete	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Epoxy zinc-rich primer	1	80-120
	High-strength waterproof putty	——	——
	Epoxy Mica Intermediate Paint	1	60-80
	Fluorocarbon topcoat	1	80