The measurement methods of corosion rate for several steels

such as the static state weight loss method

the dynamic corrosion test method

the influence of Fe3+ test method

and the electro-chemical corrosion test method

used in the process of chemical cleaning have been compared and analysed.Test results show that the factors

namely the flow speed of cleaning medium

the concentration of Fe3+

the pH valve of flushing water

and the dosage of inhibitor in washing stage etc.

have large influence upon the corrosion rate of steel.In order to evaluate the influence of chemical cleaning liquid upon the corrosion rate of steel

the dynamic corrosion test method and the influence of Fe3+ test method have to be used

while the electro-chemical test method is one of the most useful test methods to study the corrosion performance of chemical cleaning lequid

and an on-line corrosion monitoring method in practical process of chemical cleaning.