Coatings World - December 2016

was 10.84. This very slight change in Log Z indicates the new Axalta internal pipe coating did not lose barrier properties, even after exposure to high temperatures and high levels of oil;eld gas contaminants.

Conclusion

As demonstrated by the post-autoclave exposure results, FBE coatings with lower glass transition temperatures do not offer protection for valuable steel assets in high temperature, highly corrosive environments. At temperatures well above the Tg of the coating, water, gas, and other ion permeation is inevitable. However, the newly developed Axalta internal pipe coating system (with a Tg of greater than 180 °C) protects even in the most extreme environments.

The corrosion problems associated
with higher temperatures and higher
concentrations of gas contaminants does
not necessarily constrain engineers and
designers to the use of expensive alloys
for piping. A coating solution for the
challenges of the new oil and gas mar-
ketspace now exists. CW

References

1. Al Borno, A. EIS. EIS: Charter Coating Available at: http://www.charter-coating.com/coating_inspection/eis.php.

(Accessed: 1st November 2016).

2.EIS of Organic Coatings and Paints. EIS of Organic Coatings-Paints: Electrochemical Impedance Spectroscopy Available at: http://www.gamry.com/ application-notes/eis/eis-of-organic-coatings-and-paints/. (Accessed: 4th November 2016).

3. RAE Coatings Laboratory. RAE Coatings Laboratory Available at: http:// www.raecoatingslab.ca/electrochemical-impedance-spectroscopy-eis. (Accessed:

4th November 2016).

4. Lopez, C.; Allen, F.; Teran, O.;

Abisambra, R. Coping with the Heat.

World Pipeline (2015).

5. Sour crude oil. Wikipedia Available at: https://en.wikipedia.org/wiki/

sour_crude_oil. (Accessed: 1st November 2016).

6. Rao, S. M.SC.; Cortes, J. B.SC.; Dawson, K. PH.D.; Rao, J. B.SC. Autoclave Test of Black Beauty NAP-GARD 7-0017 VHT Coating as per Chevron Joint Operation, Wafra “Quali;cation of Internal Epoxy Coating Products” Attachment- 3 Test Condition 4. February 2016.

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