ANTI-CORROSIVE PROTECTION

The standard activities carried out at present are:
1. A jet-blast pretreatment of the surface
2. A coat of paint
3. Surface layering of gravel and lamination
4. Surface layering of jet-blast
5. Rubber lining
6. Fluorine polymers
7. Metal spraying
8. Maintenance of concrete and reinforced concrete constructions

Anti-corrosive protection of cooling systems piping

Application of the protection system assures:
the extension of piping durability by approx. 20 years
prevention of corrosion
removal of corroded products
decrease of paint in the piping system
non-maintained operation

Following two sand blasting of the surface and the removal of excess dust, surface spraying of highly-dry epoxide is carried out. The system is applicable on both corroded and new piping systems.

Internal piping surface after the preliminary sand blasting	Corroded internal piping surface
Application of jet-spray SIGMAGUARD CSF 75	Internal piping surface after the implementation of jet-spraying
Surface detail after implementation of the jet-spray	Piping after the application of the anti-corrosive system

Repairs of condenser piping

Application of the protection system assures:
the extension of piping durability
prevention of electrical corrosion
part-filling of corroded sections of piping
easier cleaning
non-maintenance operation

Following the sealing of pipes, two surface coats of sand blasting and the removal of excess dust are applied. After sealing of pipes with rubber seals, two surface coats of jet-sprays and the removal of excess dust are applied. After the removal of rubber seals, a prime jet-spray and the sealing of pipes using polyethylene seals. The prepared pipe is filled with gravel in sequential parts in the required thickness. Following the removal of polyethylene seals and the grinding of the surface and edges, the final jet-spray is applied.

Rebuilt tube plate	Pipe surface prior to the repair / Repaired piping following two year operation
Pipes sealed with rubber seals	Coolers
Application of gravel	Application of the final jet-spray

Anti-corrosive systéme for high loading

Anti-corrosive systéme for high loading are gravel application and lamination.

Application of the protection system assures of:
high tolerance against chemical load
extraordinary tolerance against mechanical load
heating tolerance
high durability
simple repairable qualities and maintenance

After the surface sand blasting and the removal of excess dust, the prime coat is applied. The primed surface is applied with gravel in the required thickness. The system is concluded via the final coat. It is possible to protect extreme mechanically challenged parts of the construction using glass lamination. The number of laminated layers are determined by loading. The individual layers are vented via rolling and the system is concluded via the final coat.

Prime paint-coat	Gravel application
Lamination application	Gravel application
Detail of gravel on flange	Control of the entirety via spark test
Desulphurization structure in BLG, Maritsa II Power Plant - sand blasting, lining

Sand blasting and painting of steel constructions

The sand blasting assures of:
the removal of impurities such as rust, scales, grease, deposits
the removal of old paint coats
the enlarging of guy surfaces - increasing of surface coarseness

Following the surface sand blasting and the removal of excess dust, a paint coat, via the method of brush, rolling or spraying, is applied.

Previous paint procedures	Corroded surface / sand blasting surface SA 2,5
Sand blasting of the external pipe surface	Mobile blasting hall
Surface sand blasting	Paint of the internal pipe surface

Rubber lining

The system application ensures as follows:
Material anticorrosive protection in precise layers
High durability in all chemical loading

Apply the primer after both surface abrasive blasting and dirt removal; stick the rubber foil with that using appropriate adhesives (various composition, thickness, and vulcanisation phase - commensurate with chemical load). This foil is thereafter vulcanised suitably by means of stem, hot air, hot iron, or in pressure cooker to create a compact, highly adhesive layer jointly with the undercoat being ready for loading.

Internal scaffolds for rubber lining and coating works in plant components and tanks	Detail of equipment technological parts rubber lining
Detail rubber lining	Equipment technological parts rubber lining