Type 316LN rebars being installed in a bridge deck on highway 407 just north of
Toronto, Canada (Photo copyrighte dby NiDI)

RANKING OF THE EMERGING TECHNOLOGIES FOR CORROSION CONTROL IN CONCRETE STRUCTURES

Based on the effectiveness in reducing or stopping the corrosion of steel reinforcement, the following ranking is suggested:
 
 

1	Impressed Cathodic Protection (ICCP)	For repair /rehabilitation For new structures
2	Stainless steel / duplex stainless steel	For repair /rehabilitation For new structures
3	Sacrificial Anode (SA) system	For repair/rehabiliation
4	Electrochemical Treatment ER/ECR (or CE)	For repair/rehabilitation
5	Conventional patch repair	Base for comparison

CONCLUSIONS

The emerging technologies are increasingly used for the repair and rehabilitation of reinforced concrete structures due to their effectiveness and ease of installations. For long-lasting cost effective structures and facilities, these emerging technologies are already used for corrosion prevention in new concrete structures exposed to more corrosive environments.

ACKNOWLEDGEMENT

The author wishes to thank the following organizations and companies for the permission to use copyrighted photographs, drawings and illustrations in this paper: The Nickel Development Institute, 3M Company (S) Pte Ltd, Fosroc International.

REFERENCES

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