过碳酸盐洗衣机槽清洗剂相关性能及评价方法的研究

INVESTIGATION ON THE PERCARBONATE CLEANING AGENTS FOR WASHING TANK AND THE EVALUATION METHOD

目的研究过碳酸盐洗衣机槽清洗剂相关性能和评价方法。方法采用悬液定量杀菌试验、金属腐蚀性试验和现场试验的方法进行实验研究。结果以含6.25g/L过碳酸盐洗衣机槽清洗剂的水溶液,作用120min,对大肠杆菌、金黄色葡萄球菌、白色念珠菌的平均杀灭率分别为100%、99.98%、99.91%,有机物浓度升高,杀菌效果明显减弱。注水至洗衣机最高水位,加入洗衣机槽清洗剂250g,作用120min,使洗衣机水中微生物的平均杀灭率为98.45%,第二次注水后测得洗衣机槽微生物的清除率为83.27%,第三次注水后测得洗衣机槽微生物的清除率为92.01%。过碳酸盐洗衣机清洗剂对不锈钢基本无腐蚀,对铜和铝为轻度腐蚀,对碳钢为中度腐蚀。结论过碳酸盐洗衣机槽清洗剂对污染的洗衣机有良好的杀菌和清洁作用,对金属有一定的腐蚀性,有机物对杀菌效果有一定的影响。

Objective The aim of the study is to know the effect of the percarbonate cleaning agent for washing tank and the evaluation method. Methods Suspension quantitative germicidal test, metal corrosion test method, and field test were used. Results The average killing rate was 100%, 99.98%, 99.91% for Escherichia eoli, Staphylococcus aureus, and Candida albicans by using percarbonate aqueous cleaning agent （ 6.25g/L ） to wash tank for 120 min, respectively. However, when organic concentration increased, the bactericidal effect was significantly weakened. When water in washing machine was in the highest level, 250g detergent was added into washing tank for 120 rain, the average killing rate to bacteria in the water was 98.45%, 83.27% after the second adding water, and 92.01% after the third adding water. Percarbonate cleaning agents almost had no corrosion on stainless steel, but mild corrosion on copper and moderate corrosion on carbon steel.Conclusion The percarbonate cleaning agents has a good bactericidal and cleansing effect on the contamination of the washing machine, and had some corrosion on the metal.