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Survey Jetties 

Corrosion Survey on Jetties

Corrosion Survey on Jetties

As general indication, without any protection, the steel wallthickness of an unprotected jetty pile in Indonesia will on average reduce 0.02-0.20 mm/year on the sea bottom, 0.05-0.07 mm/year on the top of the pile, but even 1.5-1.75 mm/year in the splash zone. (examples of unprotected jetty piles)

Note: This average reduction of the steel wallthickness is an accumulation of corrosion from the outside as well as from the inside of the steel piles.

(Check out:  'The Proof is in the Testing')

To avoid thickness reduction of the steel wall of the piles we offer the following products and solutions for new and existing jetty piles:

Survey on existing Jetties

For existing jetty piles we can conduct a survey – at cost - by our experienced engineers to do a comprehensive analysis of the installation at your site and advise you what needs to be done to extend the lifetime of the jetty piles in case the current protection is not adequate.

Main Survey activities (In general)

1. Splash Zone Protection
   • To determine visual status of current coating systems
   • To determine the current thickness of individual piles of the Jetty by means of ultrasonic testing
2. Cathodic Protection
   • Check current status of Cathodic protection
   • Measurements of protective potential by means of reference and voltage meter
   • Check on presence of bonding between piles
3. Internal Corrosion
   • A random check on a percentage of the piles on the internal corrosion status to determine if corrosion control by means of inhibitors is necessary and/or required
4. Pile Cap
   • To determine visual status of current Pile Cap
     

Survey Reports

For every item we will prepare a survey report with findings and recommendations in accordance with the international NACE International standards.

More Information

We shall be pleased to explain more in detail the survey activities, equipment/ resources to be used and what you can expect in the survey reports.

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