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kenny1999
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I think most refrigerators have their cases and doors attracting to magnet, but their surface look like plastic plate. what are they actually made of?
But how do you feel? Cold?hutchphd said:I just spent the morning in my freezer. It is feeling better now.
Usually, a ferritic stainless steel; ferritic and martensitic steels are ferromagnetic, while austenitic stainless steels are paramagnetic to diamagnetic. Older refrigerators that corrode are probably a low alloy carbon steel, with a low level of chromium, which is used in stainless steel to provide corrosion protection. Ceramic enamel is applied to the finished steel surface, and plastic is placed on the interior with insulation in between.kenny1999 said:I think most refrigerators have their cases and doors attracting to magnet, but their surface look like plastic plate. what are they actually made of?
I have a 1987 vintage Whirlpool that shows signs of rust where the paint is pitted.Astronuc said:Older refrigerators that corrode
Probably was. We have an 'old' refrigerator that is also rusting where the enamel is cracked or pitted.rbelli1 said:I have a 1987 vintage Whirlpool that shows signs of rust where the paint is pitted.
I don't know if that is typical for that time period.
Ref: https://www.uakc.com/blog/stainless-steel-differences/here is stainless steel and then there is stainless steel. All stainless steels are not created equal. The metallurgists among us will point out that there are 5 different categories of stainless steel: martensitic, ferritic, austenitic, duplex (ferritic-austenitic), and precipitation-hardening stainless steels.
The vast majority of major appliances are made of 304 (austenitic) type stainless steel or 430 (ferritic) stainless steel. Even within these two different categories there are different grades, gauges, and finishes. Moreover, some manufacturers will use different types of stainless steel on the same appliances. For example, a dishwasher tub might have different stainless steel than the dishwasher door. Some stainless steel has superior fabrication characteristics, while others works better in specific temperature ranges, or is more corrosion resistant.
The surface of a fridge door is typically made from a sheet of metal, such as stainless steel or aluminum. This metal is then coated with a layer of paint or enamel to give it a smooth and visually appealing finish.
Yes, the surface of a fridge door is typically magnetic. This is because the metal used to make the door is usually ferromagnetic, meaning it can be magnetized. However, some fridge doors may have a non-magnetic coating, so it's always best to check before assuming it is magnetic.
The surface of a fridge door can be scratched, but it is usually quite durable. The paint or enamel coating helps to protect the metal underneath from scratches. However, using abrasive cleaners or rough materials can still cause damage to the surface, so it's best to use gentle cleaning methods.
The surface of a fridge door stays cool because it is in direct contact with the inside of the fridge, which is kept at a low temperature. The metal used to make the door is a good conductor of heat, so it helps to transfer the cold temperature from the inside of the fridge to the outside, keeping the surface cool to the touch.
Yes, the surface of a fridge door can rust if the metal underneath the paint or enamel coating is exposed to moisture and oxygen. This can happen if the surface is scratched or damaged. To prevent rust, it's important to keep the surface clean and dry, and to fix any scratches or chips in the coating as soon as possible.