tinplate

1, What is tinplate
Tin is coated with a layer of tin metal, it is not easy to rust, also known as tin-plated iron. The liquid iron dipped in molten tin in the system. Tin is not active metal than iron, neither air nor water oxidation reaction, so there are very strong corrosion resistance. Iron on a thin layer of tin-plated can play a good protection. However, after the coating is damaged electrochemical corrosion, due to iron and lively than tin, iron, as the original battery negative oxidation and loss, the presence of tin will accelerate the corrosion rate of iron, tin and tin so different, it can only In the case of intact coating to protect iron have a role.
Tin was first produced in Bohemia (now Czech Republic and Slovakia). The land is rich in metal since ancient times, advanced technology, and know how to use water in the machine, from the 14th century began to produce tin. In a very long period of time, there has been a major producer of tin in the world. Tinplate was the main tool used to make cutlery and drinking.
Tin the 17th century, Britain, France, Sweden had hope to establish their own tinplate industry, but due to the large sums of money, it has not yet been developed. Until 1811, Brian Tang gold and John Hall opened tin of canned food, the only large-scale manufacture of tinplate developed. Today, the world's annual production of about 250,000 tons of tin, 1 / 3 used to make tinplate, most of which used to canned food industry.
2, tin hardness test
Tin of hardness testing in the past they use a desktop surface Rockwell hardness tester, using ordinary steel flat anvil test HR30T hardness.
In recent years, the national standards GB/T2520-2000 on tin began to adopt the internationally accepted HR30Tm hardness of said methods, so the country has started using diamond anvils, tin HR30Tm hardness test.
However, hardness testing HR30Tm need a diamond anvil, and the Rockwell hardness tester made little accessories you can buy this. Because the right to buy the diamond anvil hard, the surface hardness and desktop more expensive. Therefore, HR30Tm hardness of representation in the application of domestic tinplate industry, the line also is not common. Especially in the use of tinplate manufacturers, despite the general awareness of people is also intended to tin hardness is important, it will be related to the quality of processed products, related to the productivity and enterprise efficiency. But most companies are not buying the hardness of the tin timber re-examination.
Now the situation is different, Shenyang Star Monitoring Instrument Co., Ltd. has produced a PHR Series Portable Rockwell surface hardness, it weighs only one percent of the desktop, the desktop is only half the price, accuracy and desktop the same machine, are in line with Rockwell hardness test on aspects of the national standard GB / T 230.1-2004 tinplate set of rules. As an option, Shenyang Star company also provides for testing the hardness of the diamond point HR30Tm anvil, its price is only one-fifth of the domestic like product.
Testing the hardness of tinplate can use PHR-1S-type surface Rockwell hardness tester, it weighs only 0.7kg, you can test the thickness of 0.05 ~ 25mm strip material, the test tube wall above the inner diameter of 26mm hardness testing of more than 30mm diameter pipe wall hardness. Coupled with diamond anvil point of HR30Tm tin can test the hardness. This instrument can easily zone to the production site and sales materials storage site and to use. Tinplate production plant can be used for online quality control, can also be used for tinplate plant material re-use, you can also go to buy materials to the steel market. If coupled with an option bearing in, you can also put a platform (such as desks) for accurate testing.