Sem stendur, many daily necessities are made of materials such as copper, járn, ryðfríu stáli, o.s.frv. Þessi efni innihalda þungmálmþætti, which may cause excessive standards if not handled properly.
Til dæmis, the main element of stainless steel contains manganese, króm, og nikkel. To maintain corrosion resistance, ryðfríu stáli verður að innihalda ákveðið magn af króm. 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, áli, og blý. Ef það er ekkert blý, það er erfitt að myndast við steypu. Því hærra sem blýinnihaldið er, the easier the casting process is. Þess vegna, 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.
Önnur ástæða er sú að tækni og búnaður fyrirtækisins er að eldast, resulting in the control of trace elements. Venjulega, þegar nýi búnaðurinn er fyrst tekinn í framleiðslu, vörur þess eru hæfar, en þegar tækin eru notuð í langan tíma, 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. Hins vegar, 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. Þetta er vegna þess að sumir framleiðendur kaupa ekki venjulegar koparblendi til að hafa stjórn á kostnaði, 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.
Hvernig á að greina óæðri blöndunartæki frá verði? 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.
“Miðað við stórar vörur, tens of dollars of faucets are really not worth spending so much time and energy to pick one by one, og mun ekki borga eftirtekt til vandamálsins um of mikið blýefni.” A Shanghai resident who is renovating at home told reporters.
Í þessu sambandi, 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.

iVIGA Tap Factory Birgir