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why high quality 304(18/8)stainless steel vaccum flask become rusty after used


In our daily life, we found that the stainless steel vacuum flask in use has actually become rusty. What is going on? Today I will tell you why your stainless steel vacuum flask will rust. First of all, you should choose food-grade 304 (18/8) stainless steel insulation cups, and secondly, make sure that these insulation cups do not come into contact with acidic, alkaline or high-salt liquids. For example, cola, soda water and salt water (sea water), etc. If your cup actually rusts after being in contact with these liquids, please don't be surprised. These liquids will cause 304 (18/8) stainless steel to become rusty. So how to prevent 304 stainless steel vacuum flask from rusting? First, avoid contact with these liquids, and secondly, wash your cup with clean water in time after contact with these liquids. Hope these can help you.