Tinplate is not magnetic in its elemental state. Instead, it’s produced by coating steel (formerly iron) with an antirust layer made up of tin to prevent further rusting.
Metals that can be magnetized have crystalline structures that enable them to generate magnetic fields, making them known as ferromagnetics.
Austenitic stainless steels do not exhibit magnetic properties, while all other steel alloys do.
It is not inherently magnetic.
Tinplate is a thin steel sheet covered with tin that boasts beautiful metallic luster. It boasts outstanding corrosion resistance, solderability and weldability properties and is used widely in food, beverage and aerosol can containers as it’s lightweight for easy transportation and carryability over longer distances. In addition, tinplate can safely contain chemicals as well as technical products.
Metals by themselves aren’t magnetic, but can become so with ferromagnetic or paramagnetic coatings. Iron, for instance, is one such ferromagnetic metal which can be magnetized either by itself or other magnetic materials – other ferromagnetic metals include cobalt, nickel, manganese zinc and iron whereas aluminium does not qualify as being one; instead it only magnetized through magnetic fields.
Tinplate can often have dull coatings of tinplate. To bring back their shine, flow melting/brightening is applied; this involves heating tin to melt it before flowing it under surface tension to produce a brilliant surface that is then electroplated or dip coated onto tinplate for depositing onto it.
Tinplate is not only a magnetic metal but it is also an extremely hard material which is easily formed into various shapes and sizes, making it suitable for manufacturing products like containers, trays and sheets. Furthermore, its temperature resistance makes it suitable for packaging products which need refrigeration or freezing conditions.
Tinplate can be recycled an infinite number of times, which is especially important in today’s environmentally-minded society. Recyclable tinplate reduces mining for new raw materials while cutting waste generation; furthermore, it is more eco-friendly than plastic which may harm our planet.
Tinplate can be recycled over and over without diminishing in quality, making it an eco-friendly material suitable for packaging and other industrial uses. As it can also be safely reused after being dropped or damaged, making tinplate the ideal material to store liquids or products that need special conditions of storage.
It is paramagnetic.
Tinplate is created by covering a low carbon steel base with a thin layer of tin, creating a durable yet beautiful metallic luster, corrosion resistance and solderability that makes for easy assemblage and solderability. Tinplate can be found everywhere from food cans and containers, to graters badges pans and automotive air and oil filters – it even blocks electromagnetic interference! Tinplate shielding has also proven useful as electronic shielding material due to its ability to shield electromagnetic radiation.
Conventional tinplate is made through hot-dipped tin plating and typically contains 97% tin by weight. Typically produced on continuous hot-dip lines and rolled to thickness of 0.13 mm, before it is pickled to remove scale deposits and annealed to prevent strain hardening before its final coat of tin plating is applied – usually somewhere between 0.5gsm to 34 gsm per square meter, representing less than one percent of overall plate thickness.
To verify that a tin coating possesses excellent wetting properties, a technique known as wetting balance testing may be used. This test measures forces which occur when immersing a sample in a solder bath – initially positive but later becoming negative as wetting takes place and measured against time. This measurement process can then be recorded.
The wetting balance is a quick and straightforward way to assess the wetting strength of tinplate, helping to determine whether or not its magnetic response meets minimum standards. Results should be interpreted carefully due to possible influences such as bath temperature or impurities present within tin.
Coulometric testing of tinplate wetting involves measuring the potential difference between a reference electrode and its surface of tinplate, with this test often used to assess coating consistency; it should always be checked beforehand using a “dummy run”, to make sure all controls are functioning as planned.
It is ferromagnetic.
Tinplate is a steel-based metal that has been coated in tin to give it its unique metallic luster, as well as excellent solderability, weldability, and corrosion resistance properties. Tinplate can also be found used for making all sorts of cans such as soda and food cans.
Tinplate may not naturally be magnetic, but when heated it can become magnetized – known as ferromagnetism – and this process is what gives iron and other metals their magnetic qualities. When subject to an external magnetic field application, its electrons align themselves in accordance with its direction of application to create a permanent magnetic field around its surface that extends out from it.
Ferrous metals have many applications and can be found in construction, transportation and the production of electric appliances and motors. Ferrous metals boast high tensile strength and corrosion resistance while remaining easy to work with and fabricate into various shapes – however their low melting points cause them to deform easily, making rusting more likely than with other metals.
As soon as a magnetic field is applied to tinplate, its domain walls begin to shift within its atomic structures, changing polarization of atoms within them and altering magnetic susceptibility; eventually this causes magnetism of the material to increase as its magnetic field intensifies.
Tinplate contains numerous magnetic dipoles, or pairs of oppositely charged electrons that attract one another over long distances, but which cancel each other out over short distances. When introduced with a magnet, however, these magnetic dipoles reorient into more parallel positions to reduce magnetostatic energy and produce a magnetic field from its surface.
Tinplate can be transformed into a magnet by applying an insulated wire as a temporary magnet by wrapping an inch-long tail at either end and tightly coiling it around it several dozen times, leaving an inch tail at each end for easy handling. As more times as you wrap, the stronger its magnetic field becomes. Coiled wire magnets only produce magnetic fields while electrical current runs.
It is non-magnetic.
Though steel used to produce tinplate is naturally magnetic, adding a coating of elemental tin does not alter its magnetic properties due to being filled with electrons that make its atoms less responsive to magnetic fields. Magnetization may still be achieved by merging it with other magnetic materials or subjecting it to very low temperatures; its magnetic characteristics can also be further altered by impurities that disrupt crystal structure and electron configuration.
Modern tinplate is typically produced through the electro-tinning process, which involves passing cold-rolled steel strip through a series of tanks that electrolytically coat it with tin. This must adhere to exacting standards so that the final product will be strong, durable and easy to solder; its steel base must also be carefully managed so containers can be made with it without corrosion occurring under its coating.
Cleansing and pickling the strip are the initial steps of this process, to remove any contaminants that might compromise its quality in the final product. Next comes tin-plating tanks designed to give precise control of coating thickness; the acidic stannous process uses half as much energy than deposition from its stannic state, meaning fewer plating tanks need be utilized for similar results.
Tinplate makes an excellent material choice for packaging due to its durable, strong, and non-toxic characteristics. This versatility means it can be applied across numerous fields such as food and drink packaging, industrial equipment, cars and electronics, plus it helps conserve mining resources through recycling. Alpine Sheet Metal Systems’ sheet metal experts can assist in selecting the ideal tinplate material for your application and fabricate it using state-of-the-art technologies – for more information please reach out today.
