Tam sim no, many daily necessities are made of materials such as copper, hlau, Stainless hlau, lwm. Cov ntaub ntawv no muaj cov hlau hnyav, which may cause excessive standards if not handled properly.
Piv txwv li, the main element of stainless steel contains manganese, yeebsab, thiab npib tsib xee. To maintain corrosion resistance, stainless hlau yuav tsum muaj ib qho nyiaj ntawm chromium. If the chromium is not handled properly, it may lead to excessive chromium. Similarly, improper handling of manganese may result in excessive manganese.
The copper alloy used to make the faucet contains trace amounts of metal elements such as iron, tooj dawb, thiab coj. Yog tsis muaj txhuas, Nws yog ib qho nyuaj rau tsim thaum lub sij hawm casting. Qhov siab dua cov ntsiab lus txhuas, the easier the casting process is. Yog li ntawd, the copper faucet on the market generally contains a certain amount of lead. If the lead-free process is not done well when the factory is manufactured, it will lead to excessive lead.
Lwm qhov laj thawj yog tias lub tuam txhab thev naus laus zis thiab cov cuab yeej siv tau dhau los, resulting in the control of trace elements. Feem ntau, thaum cov cuab yeej tshiab yog thawj zaug muab tso rau hauv ntau lawm, nws cov khoom tsim nyog, tab sis thaum cov cuab yeej siv tau ntev, the trace elements of the product will exceed the standard. This situation cannot be repaired from a technical point of view, and only new equipment can be replaced. Txawm li cas los, some factories continue to use it in order to save money. This is a technical problem and a cost issue.
A bathroom equipment seller told reporters that most of the faucets on the market today are copper cores, but the quality is not good. Small manufacturers, cheap faucets, the possibility of lead exceeding the standard is very large. Qhov no yog vim qee cov tuam txhab lag luam tsis yuav cov qauv tooj dag kom tswj tau cov nqi, but purchase cheap lead brass from small workshops as raw materials. This lead brass is often high in lead but at half the price of brass alloy.
Yuav ua li cas paub qhov txawv ntawm cov faucets tsis zoo los ntawm tus nqi? Some insiders told reporters that a copper faucet with a formal process should cost more than 100 yuan, while tens of faucets are likely to use lead brass.
“Piv rau cov khoom loj, tens of dollars of faucets are really not worth spending so much time and energy to pick one by one, thiab yuav tsis xyuam xim rau qhov teeb meem ntawm cov ntsiab lus txhuas ntau dhau.” A Shanghai resident who is renovating at home told reporters.
Hauv qhov no, some insiders said that domestic consumers pay insufficient attention to the quality and safety of faucets, which also makes many unqualified inferior faucets have opportunities.

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