Emulsification tests show that the HLB value of press oil for anode button is 14.6.Based on the HLB value and the nature of greasy dirt on metal surface

four surfactants with the best emulsification effectiveness and the most effective concentrations were decided after selecting from as many commonly used surfactants as possible.First

four surfactants were identified.Second

these surfactants of three different concentrations were mixed according to L9(34) orthogonal test table to form corresponding detergents and tests were made with these detergents on anode button

then the best make-up of detergent was decided by the cleaning effectiveness that was evaluated with the overall balance method.Finally

the test results were verified by the principle that emulsification effectiveness is the best when the HLB value of the mixed surfactants equals the HLB value needed for emulsified oil.