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Identification of stainless steel and shoddy easy way
Issuer:Huanyulongfei Issue time:2008-10-7 Read£º175 times
People tend to think that, "Stainless Steel" is "not rusty steel", if the rust that is definitely a fake and shoddy products. Recognizing this, of course, is simplistic. First of all stainless steel "stainless" is not absolute and do not rust, but relatively under certain conditions, not rust. If properly used, will be in use beyond its ability to corrosion or environmental conditions, rust naturally. Second, products used in stainless steel corrosion appeared rusty, it may be unreasonable because the material manufacturers, for manufacturers that use its products and a selection of appropriate grades of stainless steel raw material to do, or it may be the factory production and processing technology related, however. In addition, the factory that is indeed the choice of the market do not meet the relevant national authority or industry-standard and inferior raw materials, stainless steel do. In any case, these manufacturers are in the procurement process and should face and resolve. In view of the current market, there is indeed the production and sale of low-grade stainless steel, as well as Yicichonghao, the quality of the forged certificates to deceive the market, we are in the procurement of stainless steel materials in order to seize the initiative and how quickly how to detect such fraud, free The stainless steel was inferior against it? These may be the same bright stainless steel, from the look on their distinguished merits of true and false, even if the experts as unlikely to do that if there is no easy way out? Some people say that: This is simple to use magnet smoke! Can not smoke is good, "stainless steel", Xi Zhu is poor, "stainless iron!" This is the present, the practice seems to be very popular, and even Science and technology publications, television programs over the implementation of this law. For this, practices, industry experts gave a negative, is a very unscientific and wrong. At present, the world has been the development and application of stainless steel top-five, only austenitic stainless steel (300 series large number of brands, the 200 series grades) are often non-magnetic (processed or weak magnetic), and ferrite stainless steel (400 series large number of brands) , Duplex stainless steel, martensitic stainless steel, precipitation hardening stainless steel with a magnetic. With or without magnetic, stainless steel each has its own characteristics and scope. 300 austenitic stainless steel grades most widely used, but with a modern magnetic ferrite, and other types of stainless steel proportion of the use of more and more meals in the kitchen products, home appliances appliances, decorative, automotive exhaust systems, petrochemical and other civilian, Industry can substitute for part of the Department of austenitic 300 stainless steel. 200 for the magnet system that "can not smoke," the austenitic stainless steel, manganese, nickel on behalf of nitrogen than the 300 system to reduce the cost of steel, increased strength, but because of its corrosion resistance decreased, making its application in the field Narrow, often those that require high-intensity, non-magnetic and corrosion resistance of less demanding areas, such as springs, electronic equipment and so on.. As for the currently prevalent in the Chinese market, the so-called "200 stainless steel line", corrosion resistance and its value is low. These products have not been in accordance with national standards of production, but in accordance with its very strict standards for enterprises to lower the steel in the nickel, chromium, manganese content increased, and some have even dropped to Nickel less than 1%, down to the chrome 10%, manganese by 14% to more than its equivalent pitting very low, far below the national standard. From the corrosion resistance, these products may not even be called stainless steel, it can not be called the Department of stainless steel 200.stainless steel system" is currently the biggest problem with steel, steel and shoddy, but it is yet and the Department of austenitic 300 stainless steel, precisely Is a non-magnetic steel of austenite! It can be said that the current Chinese market magnet used suction to identify the advantages and disadvantages of stainless steel, stainless steel and shoddy often condoned, and the exclusion of high-quality magnetic ferrite, and other types of steel and at the same time As a result of the cost factor out the non-magnetic 300 grade austenitic stainless steel, and may even make it to be fake and shoddy steel into the non-magnetic 300 grade austenitic stainless steel were used in industry. Through the use of stainless steel magnet smoke to identify strengths and weaknesses is obviously not true, that there is no other practical and easy way to do that? The answer is yes. In the introduction to a simple way,that is, the determination of the use of stainless steel hydraulic differential is determined by observing the liquid solution in the measurement of steel produced in the process of changing the color or distinction to determine the characteristics of the steel measuring the number of cases. "Color changes" are often measured in steel and nickel (Ni), molybdenum (Mo), manganese (Mn), and other elements related to the specific. At present, China¡¯s stainless steel market determination of a lot of liquid products, imported from Japan and other countries, there is a lot of China-made. In particular, China¡¯s stainless steel industry and stainless steel scrap recycling industry is relatively developed areas, such as Dainan Jiangsu, Wuxi, Foshan, Guangdong, Zhejiang, Ningbo and other places, there have been some development of specialized manufacturers of stainless steel DETERMINATION liquid, and some of the previously engaged in chemical technology , Chemical reagents business, but also for the needs of the stainless steel industry has developed a stainless steel solution determined. China¡¯s stainless steel DETERMINATION liquid although many brands, but the product appears to be identical, Basically, there are no batteries to be allocated and used two types of cells. Not required for the purposes of such batteries are often not broken down, mainly through droplets in the determination to see the surface of stainless steel after the color changes, and then distinguish chromatography cf. If there on the market called "304", which marked the four standard colors corresponding to the four grades of stainless steel --- 201,202,301,304, of which 201 correspond to dark red, red corresponds to 202, 301 corresponds to light Red, yellow or colorless corresponding to 304. These colors refers to the determination of the appropriate solution for conducting tests on steel were shown a color. The market determination of the battery fluid there are many, such as "Mo2, low-Ni, Ni2, Ni4, Ni6, Ni8, Ni14, Ni20, Ni40, Ni60" and so on, and some logo on products with "N" instead of "Ni" . These products are used alone or with the use of steel can be measured in nickel (Ni), molybdenum (Mo), manganese (Mn), and other relevant elements of the general content (percentage), and then, mutatis mutandis, the relevant national authority of the content standards to distinguish between true and false priorities of Steel Bad. For example, "Ni8" Determination of liquid, the amount of first use "Ni8" drug drop in the clean steel surface, and then there will be sufficient dedicated battery power (typically 9V, manufacturers can be placed) then the cathode plate, connected to the negative electrode On the surface of steel "Ni8" drug-chu (be careful not to come into contact with the surface of steel), a few seconds after the cessation of electricity in order to observe the drug on the surface of steel beads change color, the color red, indicated that steel with nickel in the 8% And above, otherwise the drug will become light yellow color beads or no change. Another example is the "low-Ni" solution will be fluid, is a determination of low nickel (Ni) high manganese (Mn) of stainless steel a powerful weapon, such as electricity oxidation after Chu drug was purple, then show that manganese steel in more than 6%, nickel In the general content of 5.5 percent less electricity, such as oxidation was colorless or light yellow, usually 301,304,430 and other materials. Another example is "Mo2" Determination of liquid, such as oxide generate electricity not faded red complex indicates that molybdenum in steel content in about 2% or more of each product ... ... to use in their prospectuses will be the use of detail. Determination of the use of stainless steel liquid, to a certain extent, we can easily see through the market some of the fraud and shoddy real face of stainless steel. For example, to buy 304 brands of stainless steel, we can provide manufacturers of the "304" products for testing. 304 is really the case, we use the above-mentioned "304" Determination of fluid "Ni8" Determination of liquid-based test, it should appear corresponding tests, unless, it is not really 304; If you use the "low-Ni" determination to further test liquid Drugs were found in purple beads, that the product is a high manganese steel, it is likely to be on the market today is very low prevalence of the corrosion resistance of stainless steel and shoddy, the so-called "200 stainless steel system." In measuring the use of stainless steel in more or less specific elements of the determination of fluid for testing to identify, and asked us to learn more about stainless steel in the light of national standards for chemical composition. At present, the use of stainless steel DETERMINATION solution to identify, in fact, only to a certain extent, answered "no" and can not really answer the question "What is the precise". For example: "304" Determination of fluid "Ni8" Determination of liquid-based testing business of the so-called "304", if the test results and true 304 of the same product, not connection, we must conclude that it is 304, and can only say that "might "304. Because whether or not power-based electricity, but the results of tests to judge the measure of our steel is a kind of steel (for example, 304) a necessary but not sufficient condition. If we really want to find out the exact brand of steel, it must be a professional or chemical analysis methods such as spectral analysis, a comprehensive determination of its chemical composition, and control standards to identify the relevant authority. Of course these methods with the use of stainless steel solution determined, more professional and accurate, but also the difficulty or cost a lot of high. In addition, the stainless steel material is not just the high and low quality of its chemical constituents of the decision, but also with the organization, performance, purity, and other factors. As for the determination of these factors, stainless steel liquid is clear that determination is powerless to do anything, only the help of the relevant professional inspection test. At present, the market¡¯s determination of liquid steel products, logos and so on are still not enough science. As mentioned above, with "N" instead of "Ni", there will be 200 stainless steel lines into "200,201,202". In practice, the use of the process also found that some test results with the naked eye observation is difficult to distinguish easily lead to errors. In addition to testing, such as when there are between 201,202 and 301,304 of the more obvious color difference, between 201 and 202, 301 and 304 between the color change is not obvious. These scientific and inadequacies of the need to further improve the manufacturers. In any case, in the procurement of stainless steel products, in addition to the attention of the products the factory inspection certificate or certificate of quality, it is necessary to pay attention to the credibility of the business, rather than yield to the temptation of cheap, we see through the market in the fraud and shoddy products, the true face of stainless steel, or Can take the initiative to take some action. At present, the market determination of small bottles of liquid steel, are relatively small size and light weight are easy to carry, the cost of low-cost (price per bottle at more than 10 varieties from 20 to 30 yuan per month to each test costs are Only a fraction of the money) to test the operation is simple, can be a powerful tool and the "arms", we may as well give it a try.
