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How can we protect steel structures from corrosion in water for fifty or more years?

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Question added by Hawas Bajawi , Executive Director Water, Oil & Gas Sector , AlSharif Group Holding (ASG)
Date Posted: 2017/06/07
Adham Barakat
by Adham Barakat , Senior Consultant Civil / Structural , Worley

Commonly sacrificial anodes are installed on submereged structural members for corrosion protection in seawater. The sacrificial anodes size and material are determined by material / corrosion specialist engineers and included in the structural weight for weight control purposes such as the cases of O&G offshore drilling / production platforms.

Topsides members are treated with corrosion protection paint systems which are periodically inspected and rehabilitated if necessary to a predetermined maintenance program along the service life of the installation. Splash zone members are treated by high-build inert coatings (e.g. glass flakes coatings) for both corrosion protection and where common protection paint quickly deteriorates under mechanical erosion action from wave slams impact forces.

All the above is not within common structural engineering specific specialities but only for interfacing with the material / corrosion discipline specialist during structural design.

MAHMOUD SABRY
by MAHMOUD SABRY , (alum. - steel) metal project engineer , AL HAMAD COMPANY

galvanized stell - sand plast - spatial painting

Mahmoud Atia
by Mahmoud Atia , Construction Site Manager , arcon group for contracting

galvanized stell , casoidic protection

MRUTYUNJAYA BELLIGATTI
by MRUTYUNJAYA BELLIGATTI , SITE Engineer , ALWANEES BUILDING CONTRACTING

A single component water based acrylic coating is applied to the surface using hydro blasting methods

Lea Safity
by Lea Safity , Civil Engineer , SEMAAN Eng. Group

Galvanazing the steel

Effective cathodic protection

Deleted user
by Deleted user

Two Possible Corrosion Mitigation Solutions :

1. Cathodic Protection - Impressed Current or Sacrificial Anode

2. Protective Coatings includes Galvanising

IRFAN HAMEED
by IRFAN HAMEED , Jr Tekla Modeler , Cleveland bridge Steel India Pvt Ltd

Protect steel Structure by Hot Dip Galvanize from corrosion

Wajid Hussain
by Wajid Hussain , Corrosion & Inspection Engineer , Sui Northern Gas Pipelines Limited

Based upon available funds.

Materials selection, corrosion allowance and effective cathodic Protection.

Omar Oudad
by Omar Oudad , Inspecteur des appareils de levage , CELIAMAT

IL FAUT FAIRE LA GALVANISATION

Sameh MHIMDI
by Sameh MHIMDI , Corrosion Engineer , PEMCO

Steel structures in water can be protected by the combination of paintng and cathodic protection. The easy method of CP is sacrificial anodes uing Aluminium, Zinc or magnesium anodes depending on the type of water.

We can  protect steel structure from corrosion mainly by three methods,

1-Painting

2-Aluminium coating

3-Cathodic protection

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