Hardness Test of Tinplate

1, What is tinplate
Tinplate is coated with a layer of tin metal, it is not easy to rust , also known as tinplate .The liquid iron dipped in molten tin in the system. Tin is not active metal than iron , neither oxidized by air without reaction with water , so there is a very strong corrosion resistance.Iron plates coated with a thin layer of tin can play a good protection . But the coating is damaged after electrochemical corrosion , due to iron ratio lively tin , iron will occur as the original battery anode oxidation reaction loss , tin presence will accelerate the corrosion rate of iron , tin and tin so different, it can only be in the case of the coating intact only to protect the role of iron steel barrel making machine.

Tin was first produced in Bohemia ( now the Czech Republic and Slovakia ) . Since ancient times, the land is rich in metals , advanced technology, and know how to use hydraulic engaged in machinery manufacturing, from the 14th century , began production of tinplate . In a very long period of time, there has been a major producer of the world's tin . Tinplate was mainly used to manufacture cutlery and drinkware .

The 17th century, Britain, France, Sweden, have hoped to establish their own tinplate industry , but due to need a lot of money , so the delay has not 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 annual production of about 250,000 tons of tin , 1/3 for the manufacture of tinplate , most of which is used to canned food industry .

2 , tinplate hardness testing
Tinplate hardness testing in the past mostly used desktop surface Rockwell hardness tester, using ordinary steel flat anvil test HR30T hardness .

In recent years, national standard GB/T2520-2000 on tinplate began to adopt a common international HR30Tm hardness of representation, so the country has started using diamond anvil , testing tinplate HR30Tm hardness value.

However, testing the hardness HR30Tm need a diamond anvil , and made a Rockwell hardness tester Few can buy this accessory . As a suitable diamond anvil difficult to buy , desktop surface hardness and expensive. Therefore , HR30Tm hardness representation in the domestic tinplate industry applications okay not widespread . Especially in the use of tinplate manufacturers , despite it is also intended to identify tinplate total hardness is important, it should related to the quality of processed products , related to productivity and enterprise efficiency. But most companies are not purchased tinplate timber for the hardness re-examination.

Now the situation is different , Shenyang Star Control Instrument Co., Ltd. has produced a PHR Series Portable Superficial Rockwell hardness tester, it weighs only one percent of the desktop , the price is only half of the desktop , the same accuracy and desktops areAbout Rockwell hardness test compliance of national standard GB / T 230.1-2004 requirements. As an option , Shenyang Star HR30Tm company also provides for testing the hardness of diamond anvil point , its price is only one-fifth of the domestic like product .

The hardness test tinplate , you can choose PHR-1S -type surface Rockwell hardness tester, it weighs only 0.7kg, you can test the thickness of 0.05 ~ 25mm strip material , testing more than 26mm diameter pipe wall hardness test more than 30mm diameter pipe wall stiffness. Coupled with diamond anvil point tinplate HR30Tm can test the hardness .This instrument can easily strip to the production site, sales site and materials warehouse to use. Tinplate production plant can be used for on-line quality control , can also be used tinplate plant material re- use , you can also go to buy materials to the steel market . If accompanied by an optional support base , but also can be placed on a platform ( such as desks ) for accurate testing .

PHR-1S -type surface Rockwell hardness Ideal for testing the hardness of tin , its adoption will give the production and use of tinplate manufacturers to bring significant benefits .