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Specialist & Protective Coatings

Why do we use specialist coating specifications?
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  • To comply with ISO 9001 standards for paint systems & coatings.​

Using one, or a combination of specially formulated products to provide protection or meet certain prescribed standards for the coating to withstand in different conditions.​

  • To provide long term protection to the material underneath the coating, particularly in extreme/harsh environments.​

  • To allow structures or machinery to have a protective and aesthetic appearance, even if the machinery itself works at conditions that would usually cause the paint to deteriorate very quickly – an example would be extremely high working temperature of an industrial steam silencer.​

  • To provide a passive form of protection in extreme conditions – for example an intumescent coating will react, and change form in the event of a fire, to insulate and therefore protect structural steel from high temperatures that could affect its integrity.     

01

C5m specification for machinery parts on offshore rig

Radiator tanks painted to a C5M specification
Gearbox housing painted to a C5M specification
  • ISO12944 is the industry standard for corrosion protection of steel structures by protective paint systems  

  • It determines, and categorises how corrosive an environment is, from a heated city building (C1) up to C5M (offshore/costal areas with high salinity)

  • What process, and products should typically be used to achieve adequate protection for each category, and how long they should, on average last for..

  • A C5M paint system, therefore, uses a combination of products, on a substrate, that make it suitable, and able to withstand the most highly corrosive environments.

  • Different products can be used to achieve the same goal, but typically would consist of a 3-coat system, and process similar to the below

  1. Sandblast to SA2.5 specification to remove all grease, millscale and contaminants etc.

  2. Apply coat of Zinc rich 2 pk epoxy primer,

  3. Intermediate coat of high build epoxy to improve barrier protection  

  4. Polyurethane Topcoat – for its durability flexibility to provide an initial layer of protection from the elements and any physical damage, finished in a standardised colour of choice for aesthetic purposes

02

Industrial Steam silencers

  • The equipment pictured are steam silencers, used in industrial settings. Their functionality requires them to be exposed, and deal with high working temperatures for long periods of time.

  • Most commonly used paints/coatings would deteriorate quickly under these working conditions.

  • Therefore we need to use specially developed products, in this case, with silicone added which adds high temperature resistance and flexibility to the paints qualities, so is great for metal surfaces working at high temperatures.

  • Preparation of the substrate to a SA 2.5 sandblasted surface to remove any rust, paint or any other contaminants from the surface.

  • 2 coata of inorganic zinc silicate primer provides long term corrosion resistance to the structure/equipment

  • Silicone aluminium topcoat to provide further protection & reinforce the heat resistance coating.

example of silicone aluminium coatings

03

Intumescent coating for structural steelwork

Structural steelwork with a 60 min fire protection coating
  • This steelwork required intumescent (fireproof) coating applied.

  • The specification will state how long the protection should protect the steelwork for- I.e 30, 60, 90 minutes etc.

  • We are then provided with a report, that instructs us to apply the coating at a specified thickness, .

  • Steelwork is blasted to SA 2.5 to remove all contaminents

  • Jotun QD pilot primer applied to seal the raw, blasted steel and provide corrosion protection

  • Steelmaster 600 WB applied to specified thickness, using airless spray.

  • Multiple coats may be required, with recordings taken between coats until required thickness is achieved

04

Cast iron Downpipe

  • This large project in London was for a listed building, that had to retain as much of the original cast iron downpipe system as possible. We had over 300m of downpipe lengths, bends and hoppers to restore.

  • All were blast cleaned to remove several coats of paint, and then painted to specification requested by the Architects. A 2-coat system of Jotamstic 90 Aluminium followed by topcoat of Jotun Hardtop.

  • Jotamastic 90 Aluminium WG is a two component epoxy mastic coating. It is aluminium pigmented for improved barrier effect from the elements

  • Jotun Hardtop then used as final protective barrier and finished in a matt white as specified 

cast iron downpipe painted to specifiation

Chiltern Blast Cleaning

sales@blast-clean.co.uk

​

01442 832 262

07753 225058

07860 279699

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