Analysis on the control of bacteria in water cleaning related to automobile painting process
[Introduction]The rinsing tanks related to the pretreatment and electrocoating processes are affected by the environment and prone to bacterial problems.Once bacteria grow in the tanks,they are difficult to be completely removed,which is easy to have an adverse effect on the circulation of the tanks and the quality of electrocoatings on car bodies.[Method]The advantages and disadvantages of chemical bactericides such as isothiazolinone,hydrogen peroxide,and nitric acid were analyzed.Ultraviolet germicidal lamp was used to improve the control of bacteria.[Result]Long-term irradiation with ultraviolet germicidal lamp effectively reduced the number of bacteria in rinsing tanks,thus reducing the dosage of chemical bactericides.[Conclusion]The installation of ultraviolet germicidal lamp in rinsing tank can not only reduce the sterilization cost and environmental pollution greatly,but also improve the sterilization efficiency.
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