Use salt water to judge the water cup 304 true or false
Use salt water to judge the water cup 304 true or false, insulation cups to use the good season is coming, many of our friends have begun to buy insulation cups, there are a lot of fake 304 on the market, I'm going to take a look at the use of salt water to judge the water cup 304 true or false with you.
Use salt water to judge the water cup 304 true or false 1Stainless steel is easy to rust when encountering acid, alkali, salt and other solutions. At this time, the commercially available stainless steel with cleaning solution or nitric acid 15℅ dilution, etc. completely clean. Vinegar essence is also an acid, a weak acid, can also remove rust. Eliminate the rust, available sandpaper or stainless steel brush, to grind and wipe, and then cleaned with cleaning solution. Stainless steel water cup with salt water can not test whether 304 material.
How to identify by the naked eye
You can use stainless steel identification potion to distinguish between real and fake 304 insulated cups, as long as the potion drops on the stainless steel.
Look at the color and speed of reaction to determine the stainless steel model. 201 stainless steel shows dark red, 202 shows red.
301 shows a light red color and 304 shows colorless or yellowish color. 304 is a general purpose stainless steel.
It is widely used to make equipment and machine parts that require good all-round performance (corrosion resistance and formability).
Using salt water to determine the authenticity of the water cup 304 2How to identify by the naked eye if it is a 304 insulated cup
It is impossible to identify with the naked eye. Do not believe that stainless steel products above the printed symbols, many 201 printed on the 304. can use a magnet to distinguish between 201 and 304 if the magnet can. Made of insulation cup to be cold processed, 201 cold processed magnetic, weaker than the general steel, iron, but also obviously feel the suction; 304 no magnetic, or very weak.
If you consider other grades of stainless steel, although there are 316, 440 and even four-digit duplex alloys, these grades, magnetic strength and weakness does not explain the problem at all, but these are more expensive than 304, or much more expensive, do not believe that the stainless steel products above the printed symbols, a lot of 201 printed on the 304.
normal Like the big names of Cuisinart, Tiger, Elephant Print, etc., insulation can generally be maintained for more than 6 hours. Thermal insulation principle is through the middle of the vacuum design to block heat convection, absolute vacuum does not exist, depending on what degree of vacuum can be achieved, the higher the degree of vacuum insulation performance is better.
Of course, on this basis, some products will be in the inner layer of the 'outside gallbladder copper-plated, the formation of a thermal network, by reflecting heat radiation to reduce heat loss. But some brands, such as AZAWAKH a wang, in addition to vacuum design will also be in the inner liner outer copper plating, double-layer protection, the overall insulation effect is much stronger.
Salt water to judge the water cup 304 true or false 3
How to distinguish the insulation cup material is 304?
The insulation principle of the insulation cup and the insulation cup material has a certain relationship, as we all know, 304 stainless steel material than the 201 material is more resistant to corrosion, the thermal insulation performance will also be better, it is the standard of the food grade stainless steel material, and, of course, the price will be more expensive, but also the price will be more than the price. Of course, the price will be more expensive, in contrast to 201 material, it can be said that 201 stainless steel material in all aspects of performance are far worse than the 304 material, and even less than the standard of the food grade, the price is also very cheap, but because of the two materials is difficult to distinguish, so in order to save costs, some unscrupulous businessmen tend to make the best of the best, 201 material stainless steel instead of 304 stainless steel, so those who can be more than 20 dollars of 304 material, the price is very cheap. So those who can easily be more than twenty 304 insulation cup, often with 201 material indiscriminately!
There are several ways to distinguish the material of the insulation cup, the simpler way to identify is to pinch your hand, if you feel the shell of the insulation cup is a little soft for, it shows that the material of this insulation cup is very likely to be 201 material, and 304 material liner with a metallic white luster, and 201 material is a little dull, of course, there is also a stainless steel testing liquid on the market, which can be used to detect the presence of stainless steel. There is a stainless steel test liquid on the market, can effectively detect whether it is 304 stainless steel material!
In fact, to buy peace of mind, you can directly ignore those cheap and unknown insulation cups, choose some of the well-known brand insulation cups, like the excellent brand of white steel story series of insulation cups, 100% 304 stainless steel, so you can use the peace of mind