Abstract: The study of groundwater concrete corrosion test now still takes single factor test. The main purpose of corrosion test is to analyse strong corrosion combination of factors and boats relations which based on known media components, and easy access to all the factors on the concrete effects of corrosion. Two composite etched test results show that Cl^- and Mg²⁺ are the strong corrosion factors. There are interactions between every corrosion factor.It should consider the relationship of each corrosion factor on evaluation of corrosion effect.

Key words: orthogonal test, concrete, corrosion