Shandong commercial newspaper reporter Zhang Yangyang Zhao man
recently, "high manganese steel" fire, because the Jiangsu Provincial Quality Supervision Bureau issued a small household electrical appliances product sampling report showed, More than 50% of the test electric kettles used high manganese steel, and pointed out that long-term human intake of manganese can cause impairment of memory, such as memory loss, which makes many consumers panic. Yesterday, an interview with reporters found that most of the kettle products sold in the Ji'nan market were certified by 3C national compulsory standards.
store shelves are full of stainless steel products reporter Zhao Manshe
< br / > 304 - printed electric kettle Yesterday, the reporters on the market for the sale of stainless steel electric kettle found that most of the electric kettles on the market were printed with 3C certification of Chinese compulsory products, which belonged to regular circulation goods, but the prices were uneven. The price of the electric kettle produced with 304 stainless steel was higher than 60 yuan, and there was still a lot of no appointment on the market. He steel logo products, the price is less than 30 yuan.
the recent continuous fermentation of the "high manganese steel" incident let a lot of public awareness, "there is no 304 logo electric kettle, I want to buy that pot," Mr. Zhang said when he bought electric kettle in the mall, "I have visited 5 stores, some pots have 304 marks, and some signs have not."
concerns about the high manganese precipitation rate of high manganese steel, which is concerned by the public. Experts point out that the high manganese content does not represent high manganese precipitation. The experts of the household electrical apparatus inspection institute in China say that the heavy metal material will precipitate when the stainless steel is over 650 degrees C, and the boiling point of the water is 100 degrees centigrade, and the electric kettle will come from it. The power is cut off, so although the content of manganese in steel is high, it does not necessarily precipitate. Experts from the stainless steel technology center of Shanghai Baosteel Research Institute believe that the manganese precipitation of high manganese steel is very low and low in the daily food environment, and the long-term use will not affect the health of the body.
an expert in metal materials research in this province also believes that the temperature of the high manganese steel electric kettle can not reach the standard of manganese precipitation, and manganese is the trace element contained in the human body. The proper absorption of manganese will not cause harm to the human body. With the metabolism of the human body, the excess manganese will also be discharged with the human body. Accumulate in the body.
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food grade national standards do not detect manganese
for stainless steel products, Shandong Quality Supervision Bureau also made a test in the near future. The result shows that 19 batch of stainless steel tableware (Qi Min) produced by 19 enterprises in the spot inspection is 100%.
two staff of the quality supervision of the Shandong Provincial Quality Supervision Bureau told reporters that 8 items such as firmness, corrosion resistance, sensory requirements and physical and chemical indexes (lead, chromium, nickel, cadmium, arsenic) of stainless steel tableware (Qi Min) were tested according to the standard requirements of this sampling inspection, which did not involve manganese. Measurement of quantity.
"our test is carried out according to the standard test method and experimental parameters designated by the state. The national standard does not stipulate the physical and chemical indexes of manganese, so it is not included in the range of sampling inspection. The detection of manganese is only a risk testing project, which is of reference value but not compulsory." The staff of the Shandong Provincial Quality Supervision Bureau told reporters.
experts remind
to be more careful about the harm of surface coating to
although the harm of high manganese steel is not as serious as network transmission, but experts also point out that high manganese steel itself is not used in the food and material industry, but mainly for wear resistant materials. "High manganese steel itself will rust," So it is not as suitable for food materials as 304 stainless steel, but because of its low price, good wear resistance, more used in industrial production, but this does not mean that high manganese steel will be harmful to the human body, but the wrong place. " A metal material expert in the province told the reporter.
but he also reminds consumers that the surface of the high manganese steel kettle sold on the market is smooth. If it is not rusty for a long time, more special surface treatment is carried out, and the precipitation of the surface material may cause harm to the human body. Therefore, when buying stainless steel kettle, try to select products with 304 stainless steel logo.