Oil & Gas -

Your samples

  • No items in the basket
  • Add more products View basket View products to order samples

Remove from basket

Are you sure you want to remove from the sample cart?

Oil & Gas
Oil & Gas
  • Products & Applications
    • Product Finder
    • Drilling  
    • Completion  
    • Stimulation  
    • Production Chemicals  
    • Enhanced Oil Recovery  
    • Pipeline and Transportation  
    • Refinery  
      • Technologies

        Technologies

        Find out more about our specialisms within the oil field and refinery.
        Discover more
  • Technical Library
    • Datasheets and MSDS  
    • Brochures  
    • Presentations  
    • Articles  
      • Product Finder

        Product Finder

        View the vast selection of products we sell into the oil and gas industry.
        Discover the product range
  • Discovery Zone
    • Regulatory Information
      • CEFAS  
      • BTEX  
    • Functions
      • Asphaltene Dispersants  
      • Cleaning Fluids  
      • Corrosion Inhibitors  
      • Defoamers  
      • Demulsifier Intermediates
        • Functions of Demulsifiers  
        • First Choice Demulsifier Tables  
        • Green Demulsifier Intermediates  
        • Relative Solubility Numbers  
        • Demulsifier Sample Kit
          • Thank You  
      • Dispersants  
      • Emulsifiers  
      • Foamers  
      • Lubricants  
      • Non Emulsifiers  
      • Paraffin Inhibitors  
      • Thinners  
      • Viscosifiers  
      • Wetting Agents  
    • Testing Methods
      • Crude Oil Bottle Test  
      • Viscometry  
      • Turbiscan  
      • Thermogravimetric Analysis  
      • Tracker  
      • EP Lubricity Meter  
      • Immersion Corrosion Testing  
      • Cold Finger Test  
      • Pour Point Analyser  
    • Events  
    • About Energy Technologies  
    • Technologies
      • Brine Solutions  
      • Corrosion Control  
      • Foam Control  
      • Flow Assurance  
      • Hydrophile Lipophile Balance  
      • Polymeric Surfactants  
      • Spacer Fluids  
      • Product Functions

        Product Functions

        Our products can be used to solve your complex challenges.
        Discover how
  • News
    • Business News  
    • Events  
    • Sustainability  
    • Trends  
    • Innovation  
      • Discovery Zone

        Discovery Zone

        Learn more about how we can help solve your most challenging problems.
        Discover more
  • Contact  
  1. Home
  2. Discovery Zone
  3. Technologies
  4. Corrosion Control

Corrosion Control

Controlling corrosion is a big challenge in the oil industry. Easily accessible oil reserves have been depleted resulting in an ever increasing requirement to explore more isolated locations, under harsher conditions. Production in these demanding locations requires continued innovation to provide new solutions for corrosion inhibition within the oil industry. We supply a range of products that are suitable for use in corrosion inhibitor formulations.

Sweet and Sour Corrosion

High pressures during the transportation of crude oil increase the concentration of dissolved gases. In sweet corrosion, carbon dioxide dissolves in water to form carbonic acid, which then reacts with the iron in the metal work to form iron carbonate. This causes pitting in the metal work and it is this corrosion that subsequently weakens the system.

In some crude oils the presence of sulphate reducing bacteria leads to the formation of hydrogen sulphide gas, which is the cause of sour corrosion. Although this type of corrosion is not as common as sweet, when it is present in a system it is more destructive. Hydrogen sulphide reacts with the steel surfaces to produce iron sulphide, leaving pitting in the steel work. Moreover, hydrogen gas is produced and collects on the surface, causing hydrogen blistering and further weakening of the pipework.
Corrosion Inhibitor Product Range
Corrosion Inhibitor Product Range

Read more

Corrosion Inhibition

Corrosion Inhibition

Our superior corrosion inhibitor range offers both oil and water-soluble products and collectively boasts a vast amount of features including: Robust film-forming characteristics and excellent stability over a range of pH and temperature values.

Read more

Water Soluble Corrosion Inhibitors

Our range of water soluble corrosion inhibitors provide superior protection in high water cut systems. Finding effective corrosion inhibitors to suit these environments is becoming increasingly important as the average water cut of the crude oil rises.

The protection offered by the following products was evaluated using a Linear Polarisation Resistance (LPR) electrochemical bubble test. C1018 carbon steel electrodes were submerged in a standard brine at 60°C and ambient pressure, under sweet corrosion conditions for 18 hours.

The results are shown in Figure 1. We offer a borate ester corrosion inhibitor which is traded under the name Crodacor BE. It is a water soluble corrosion inhibitor compatible in a wide range of formulations.

Oil Soluble Corrosion Inhibitors

Oil soluble corrosion inhibitor formulations contain several components. We offer a range of oil soluble corrosion chemistries that can protect metal components, equipment and pipelines from failure throughout all stages of oil production.

Our Pripol range contains dimer and trimer acids. Whilst dimer and trimer acids are not corrosion inhibitors in their own right, when added to imidazolines they form an oil soluble salt which offers corrosion inhibition performance.

The corrosion inhibiting properties were evaluated using an immersion corrosion test based on ASTM G31-72. C1018 carbon steel coupons were immersed in a corrosion inhibitor formulation, then held in brine at 60°C under ambient pressure for 160 hours. The results are shown in Figure 2.

Figure 1: Corrosion rate (%) in the presence of Croda's water soluble products

Figure 2: Corrosion rate (%) in the presence of Croda's oil soluble products

Neutralising Imidazolines

Choosing the right acid is an important step which will depend upon specific field conditions. The acid you choose to use can significantly enhance the corrosion inhibitor’s performance, as well as improving solubility. Neutralising imidazoline with both acetic acid and dimer acid produces oil soluble/water dispersible corrosion inhibitors. This gives you the opportunity to choose the right balance for your requirements.

To view formulations using our products, download our corrosion inhibitor brochure.
Corrosion Inhibitor Brochure
Login required

View typical formulations, information on corrosion rates and our product range.

Adobe Acrobat 1.0 MB Login required
Product Finder Search our product database
MSDS Search for a material safety datasheet
Contact Us Contact your local office

Oil & Gas

As we produce more oil we encounter new and challenging conditions creating a greater requirement for advanced chemical solutions. Globally, our products help our customers obtain more efficient operations, increased flow assurance, process cost benefits and improved environmental profiling.

Follow us on social media
  • Oil and Gas on LinkedIn

Corporate

  • Products and markets
  • Where we operate
  • Current vacancies
  • Annual Report
  • Sustainability Reports
  • GRI Report
Visit our corporate site
© 2021 Croda International Plc
© 2021 Croda International Plc | Terms and Conditions | Privacy Policy | Accessibility statement

About cookies on this site
By continuing to use this website, you agree to the use of cookies. You can find out more details in our Privacy policy.