How to identify true and false titanium steel jewelry

Titanium is not a rare metal, and the storage amount of titanium on the earth is 16 times that of the total amount of copper, nickel, lead, and zinc. The proportion of the titanium is only 1/2 of the iron, but it can withstand the hammer and stretch like copper. In the ultra -low temperature world, titanium becomes harder and has the performance of superconductors, while steel becomes fragile and incompetent. Titanium has a strong acid and alkali corrosion ability. It is soaked in the sea for 5 years and stainless corrosion, and steel will corrode and deteriorate in the sea water. Use titanium alloy to make shells for ships, and seawater cannot corrode it. The "titanium submarine" made of titanium alloy can sneak into the depth of 4,500 meters. Generally, steel submarines are easily crushed by water pressure over 300 meters. The "titanium aircraft" is solid and light. A large titanium passenger aircraft can be more than 100 people with the same heavier ordinary aircraft, and the aircraft can exceed 3,000 kilometers per hour. The aluminum alloy aircraft is up to 2400 kilometers. In the aerospace industry, titanium can be made into a "coat" for spacecraft to prevent high temperature invasion. Titanium can also be made with metal nickels with memory function with memory function. The car shell made with this "memory alloy" is rinsed with only hot water above 80 ° C after a collision accident, which will restore the shape of the car to its original state. At present, the cost of refining titanium is too high, so it is only used in some extremely important areas, such as aerospace and electronics industry. Precision instrument manufacturing and other aspects. With the emergence of various new refining methods, titanium metals have been regarded as a metal with prospects. Stainless steel is a modern material with a 60 -year development process. Since the beginning of this century, stainless steel has been invented, and stainless steel has brought the image of modern materials and the outstanding reputation in architectural applications, making their competitors envious. As long as the steel type is selected correctly, the processing is appropriate, and the maintenance is appropriate, stainless steel will not produce corrosion, erosion, rust or wear. Stainless steel is also one of the most intensity materials in the building. Because stainless steel has good corrosion resistance, it can keep the structural components permanently maintain the integrity of engineering design. Chromium -containing stainless steel also collects mechanical strength and high extension, and is easy to process and manufacture of components, which can meet the needs of architects and structural designers. In the industries of buildings, buildings and structures, the key to the success of stainless steel is that it has good corrosion resistance. Why is stainless steel resistant to corrosion? All metals react with oxygen in the atmosphere and form oxide film on the surface. Unfortunately, the iron oxide formed on ordinary carbon steel continues to oxidize, causing rust to continuously expand, and eventually forms a hole. You can use paint or oxidized metals (e.g., zinc, nickel, and chromium) for electroplating to ensure the surface of carbon steel. However, as people know, this protection is only a thin film. If the protective layer is destroyed, the steel below starts to rust. The corrosion resistance of stainless steel depends on chromium, but because chromium is one of the components of steel, the protection methods are different. When the amount of chromium reaches 10.5 %, the resistance of steel tolerance has increased significantly, but when the chromium content is higher, although it can still improve corrosion resistance, it is not obvious. The reason is that when chromium is used for alloying steel, the type of oxides on the surface is changed to the surface oxide similar to the formation of pure chrome metal. This tight adhesive chromium -enriched oxide protects the surface to prevent further oxidation. This oxidation layer is extremely thin. Through it, you can see the natural luster of the steel surface, which makes stainless steel have a unique surface. Moreover, if the surface layer is damaged, the exposed steel surface will self -repair with the atmospheric response, re -form this passivation film, and continue to play a protective effect. Therefore, all stainless steel has a common characteristic, that is, the chromium content is above 10.5 %. The type of stainless steel type stainless steel is not just a kind of stainless steel, but it means more than 100 kinds of industrial stainless steel. Each stainless steel developed has good performance in its specific application field. The key to success is first to clarify the purpose, and then determine the correct steel species. For further detailed situations of stainless steel, please refer to the stainless steel guide software prepared by NIDI. Fortunately, there are usually only six steel species related to the application of architectural structure applications. They all contain 17 to 22 % chromium, and better steel species also contain nickel. Add molybdenum can further improve the corrosion of the atmosphere, especially the corrosion resistance to the atmosphere of chloride. The experience of atmospheric corrosion shows that the degree of corrosion of the atmosphere varies from region. To facilitate the explanation, it is recommended to divide the regions into four categories, namely: rural, cities, industrial areas and coastal areas. The countryside is basically no pollution. The region has a low population density and has only pollution -free industries. The city is a typical residence, business and light industrial area, with mild pollution in this area, such as traffic pollution. The industrial zone causes atmospheric pollution to the heavy industry. Pollution may be caused by fuel, such as sulfur and nitrogen oxides, or other gases released by chemical plants or processing plants. The granules hanging in the air, like the dust or iron oxide deposition of iron or iron oxide during the steel production process, will also increase corrosion. The coastal areas usually refer to areas within one mile by the seaside. However, the ocean atmosphere can spread to the inland, especially on the island. The prevailing wind comes from the ocean and the climate is harsh. For example, this is the case for British climate, so the entire country belongs to the coastal area. If the wind is mixed with ocean mist, especially due to evaporation, salt deposition and gathering, coupled with less rainwater, and not often washed by rain, the conditions of the coastal areas are even more unfavorable. If there is industrial pollution, the corrosiveness is even greater. The research work conducted by the United States, the United Kingdom, France, Italy, Sweden, and Australia has identified the shadow of these areas to various stainless steel atmosphere.

1. Pure titanium material is relatively lighter, twice as lighter than stainless steel
2. Pure titanium color is always dark gray white. No matter how polishing the method, it will not be as bright as steel products
3. Pure titanium is no magnetic.
4. Specific method of testing authenticity: Use the corners of the titanium steel to be engraved on the white ceramic cup or on the ceramic product, leaving a mark on the mark. Black marks will not fall