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Is the Vacuum Flask Still Usable if It Has Rust Spots? Why Do Vacuum Flasks Rust?

Can the stainless vacuum flask still be used with rust spots? This question is very well asked.


Whether the stainless vacuum flask is rusted or not can be divided into two situations: one is that the inner liner of the stainless vacuum flask is rusted, and the other is that the mouth, bottom or outer shell of the stainless vacuum flask is rusted.


If the inner liner is rusted, then this kind of cup must not be used; if it is the second case, it can still be used for a short time, but the good thing is to replace it. Everyone knows that the vacuum flask is made of stainless steel, why does it still rust?


Ⅰ. Why does the stainless vacuum flask rust?


1. The inner liner of the stainless vacuum flask is rusted: the rusted inner liner can directly determine that the purchased cup does not meet the qualified standard of the stainless vacuum flask, which means that the material of the purchased cup is inferior.


Because the inner liner of the stainless vacuum flask produced in accordance with national standards will definitely not rust, unless the stainless vacuum flask is used to hold acidic liquids.


2. Rust on the mouth, bottom or shell of the stainless vacuum flask: This phenomenon can be said to occur frequently, because the outer shell of the stainless vacuum flask is made of 201 stainless steel, and it is easy to rust when it comes into contact with acidic liquid or salt water. rust phenomenon. Most of them are stainless vacuum flasks with cheap inner liner 304 and outer shell 201.


Ⅱ. Tips for buying stainless vacuum flasks


Just look at the steel stamp on the inner liner of the stainless vacuum flask, whether it has the words sus304 or 18/8 and sus316, and if so, go to the next step;


The second is to look at the manual, whether there is any information on the manufacturer, origin, etc.;


The third is the certificate;


The fourth mezzanine has no humming cups, not a vacuum flask. Put the stainless vacuum flask at the ear, and there is no humming sound in the thermos cup, which means that the cup is not a thermos cup at all, so such a cup will definitely not be insulated. As long as these four points are met, you can buy it, at least you can ensure that the inner tank will not rust, and you can drink water healthily and safely.


When buying SS vacuum flasks, please be sure to look for regular manufacturers. Solid is a well-known brand in China. The company has a manufacturing plant of 80,000 square meters and has more than 600 highly skilled workers, including 30 R&D experts and many other quality assurance experts. All our production is in compliance with BSCI social responsibility standards. In addition to our standard product line, we also offer ODM and OEM services. Welcome to consult.

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