| Title |
A Study on Nondestructive Method to Measure the Corrosion Level of Reinforcing Bar : Focused on the Electro-potential and Resistivity |
| Keywords |
Corrosion ; Corrosion measurement ; Nondestructive method |
| Abstract |
Concrete normally provides reinforcing steel with excellent corrosion protection. The high alkaline environment in concrete results in the formation of tight adhering film which passivates the steel and protects it from corrosion. Corrosion of steel however, can occur if the water, oxygen and salt ions such as chloride ion penetrate to the surface of steel through the cracks in concrete. And also corrosion can proceeds in the case of carbonation of concrete. Those corrosions severely affect the durability and service life. Therefore, the corrosion of steel in concrete has received increasing attention in recent years because of its wide occurrence in concrete structure and the high cost of repair.
In this study, the use of accelerated potentiometric corrosion method induced corrosion of steel embedded in concrete. Nondestructive techniques such as the electro-potential method and resistivity method were used. Their results were compared with the results of other tests.
Primary results of this study are as follows ;
1. While potential and resistivity values of non-corroded specimen were widely distributed, those values of corroded specimen were similar. These are due to the varying potential and resistivity value which were influenced by the environmental conditions which.
2. Concrete cover affects to the electro-potential method and resistivity method. |