Passivation

Expertise

Passivation

In 1996, BCD set up their Passivation Division and has been pioneering Passivation Services in Ireland for the past 24 years. We use licenced technology and chemistry to deliver services conforming to ASTM Standards A380 & A967. We have developed our experience of chemical applications through years of research and development. Our chelant passivation procedure has been proven to achieve excellent Chromium/Iron (Cr/Fe) ratios and higher corrosion resistance while also being the most environmentally friendly method of Passivation.

Our experienced passivation teams are fully resourced with state of the art equipment and instrumentation to provide clients with Degreasing, De-scaling, De-rouging, Passivation and Sanitisation services for a wide range of high purity process systems and equipment. We also provide dynamic flushing and chemical cleaning of low purity carbon steel process systems.

BCD will review a client’s process system and design cleaning circuits to effectively treat the system under the supervision of highly trained technicians and engineers. All our standard operating procedures are backed up by Method Statements and Risk Assessments for work in various environments on site in order to comply with current industry health and safety regulations. We are very conscious of our surrounding environment and we comply with environmental responsibilities by ensuring that all waste is disposed of using licensed contractors.


Benefits of using Chelants:

  • Improves system Chromium/Iron Ratio and achieves greater passive layer depth.
  • Pressure Vessel Design to PED, ASME VIII, PD5500 etc.
  • Environmentally Friendly (Non Hazardous Chemistry)
  • Does not affect the surface finish.
  • Minimises Personal Injury.
  • Ease of Disposal.

Services

  • Dynamic Flushing.
  • Chemical Cleaning.
  • Descaling.
  • Rouge Testing.
  • Descaling.
  • Rouge Filter testing.


  • Degreasing.
  • Passivation.
  • De-rouging.
  • Sanitisation.

Some facts about de-rouging and its importance

    • Rouge is rust on stainless steel.
    • Stainless Steel contains about 68-70% iron (Fe).
    • Once initiated, Rouge has a large well of Fe which it can leech out from the bulk phase of the Stainless Steel.
    • Corrosion once begun is continuous and self-catalyzing forming the ferric ion (Fe+++) which itself is corrosive.
    • Heavy rouge left untended will cause permanent damage via pitting which may necessitate repair or replacement of elements of the system. Pitting is a good home for bio growth.
    • Rouge can break off into colloidal rouge which can contaminate the product and can also cause rouge to migrate faster throughout system.
    • Rouge Contamination affects product purity, sanitisation efficiency and longevity of equipment life.
    • Proper rouge identification, removal and monitoring are crucial to production.
    • Preventative maintenance reduces contamination problems and system downtime.