市政行业解决方案

Time of issue:2021-08-05 11:26:01

The necessity of steel structure anticorrosion in municipal engineering

Anti-corrosion durability is always an important issue in municipal engineering construction.
Most municipal engineering projects are exposed to various natural environments or environments with chemical and physical erosion. Improper anti-corrosion treatments lead to a reduction in service life, and even cause overall damage, casualties, economic losses and social impacts. They are mainly composed of materials and It is caused by poor production, natural disasters, various traffic accidents, and metal corrosion, and metal corrosion is the main reason.

Municipal Engineering Steel Structure Coating Reference System＞＞

The steel structure of municipal engineering is generally in the corrosive environment of C2 and C3. The corrosive environment is relatively not bad, but it has higher requirements for appearance and decoration performance.
In view of the characteristics of municipal engineering, Zinc Shield recommends the following supporting system schemes:

Examples of painted parts	Protection plan	Road number	thickness(μm)
Municipal steel structure surface	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Cold spray zinc primer	1	60
	Cold spray zinc sealant	2	100
	Polyurethane finish	2	80
Outer surface of buried pipeline	Surface pretreatment	Spray Sand rust removal reaches Sa2.5 level
	Epoxy coal tar pitch primer	1	150
	Epoxy coal tar pitch paint	1	150

Coating reference system for stadium steel structure＞＞

Examples of painted parts	Protection plan	Road number	thickness(μm)
Indoor steel structure surface of stadium	Surface pretreatment	Sa2.5，Rz40-70μm
	ZD96-1Cold spray zinc primer	1	85
	ZH53-6 Cold spray zinc sealant	2	100
	Fire-retardant coating	2	According to the fire resistance class
	ZF95-51Modified fluorocarbon topcoat	2	90
Airport indoor steel structure	Surface pretreatment	Pretreatment SA2.5
	Inorganic zinc-rich	1	80μm
	Epoxy seal	1	30μm
	Epoxy mica	1	100μm
	Polyurethane finish	1	2*40μm
Airport outdoor steel structure	Surface pretreatment	Pretreatment SA3.0
	Arc spraying zinc aluminum alloy		150μm
	Epoxy seal		30μm
	Epoxy mica		100μm
	Polysiloxane		2*30 Micron

Coating reference system for traffic steel structure＞＞

Examples of painted parts	Protection plan	Road number	thickness
Elevated station canopy	Secondary surface sandblasting	Sa2.5 level，Rz55-80μm
	Water-based cold spray zinc	2	≥2×35mm
	Cold spray zinc sealant	2	≥2×40mm
	Polyurethane finish	1	≥1×40mm
	1 coat of polyurethane topcoat (on-site painting)	1	≥1×40mm
Use library	Secondary surface sandblasting	Sa2.5 level，Rz55-80μm
	Water-based cold spray zinc	2	≥2×35mm
	Cold spray zinc sealant	2	≥2×40mm
	Fire-retardant coating
	Remarks: Fireproof coatings need to meet the corresponding fire resistance limit requirements of the building requirements, and the fireproof and anticorrosive coatings should be compatible, and no chemical reaction will occur.

Reference System for Steel Structure Painting in Municipal Industry＞＞

Example of a case for repairing painted parts	Protection plan	Road number	thickness(μm)
Railing steel structure repair	Secondary surface sandblasting	Sa2.5 level，Rz55-80μm
	Epoxy glass flake anticorrosive paint primer	1	80
	Chlorinated Rubber Finish	1	80