电力行业解决方案

Time of issue:2021-08-05 11:04:49

The necessity of steel structure anticorrosion in power industry

There are many high-temperature and highly corrosive environments in the power industry. In this environment, traditional coatings are prone to cracking, peeling, and failure.
Taking the flue gas desulfurization system of a power plant, in the wet flue gas desulfurization device, there are four locations that are most vulnerable to corrosion damage, namely: absorber, scrubber, duct outlet, mixing chamber and flue. The acid condensate formed in the flue gas desulfurization process, coupled with the environment such as wear, pitting and chlorination corrosion, are the root causes of corrosion damage to stainless steel scrubbers.
Factors such as high temperature, dew point, dry-wet cycle, gas flow rate, high-concentration sulfate solution, fluoride and chloride will accelerate pitting and crevice corrosion.

Coating reference system for steel structure of substation＞＞

Examples of painted parts	Protection plan	Road number	thickness(μm)
Substation steel structure surface	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
Substation steel structure surface	Cold spray zinc primer	2	80-120
High-temperature pipelines in substations	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
High-temperature pipelines in substations	Silicone high temperature resistant paint	1	60

Coating reference system for steel structure of thermal power plant＞＞

Examples of painted parts	Protection plan	Road number	thickness(μm)
Air cooling platform/coal shed grid	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Cold spray zinc primer	2	100
	Silver metallic finish	1	20
Boiler bracket	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Cold spray zinc primer	1	80
	Cold spray zinc sealant 80um	1	80
	Polyurethane finish 70um	1	70

Solar energy steel structure coating reference system＞＞

Examples of painted parts	Protection plan	Road number	thickness(μm)
Solar steel structure surface	Surface pretreatment	Sandblasting and rust removal reach Sa2.5 level
	Cold spray zinc primer	2	80-120
	Silver metallic finish	1	60

Reference System for Maintenance and Painting of Power Steel Structure＞＞

Examples of repaired painted parts	Protection plan	Road number	thickness(μm)
Air-cooled/Boiler Support/Suspended Suite/Coal Conveying Station Shed/Grid	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	60