RoHS directive restricts the use of the following six harmful substances
1 mercury (mercury) Examples of using this substance: thermostats, sensors, switches and relays, and light bulbs.
Examples of lead using this substance: solder, glass, PVC stabilizer.
Examples of cadmium using this substance: switches, springs, connectors, housings and printed circuit boards, contacts and batteries.
Example of chromium (hexavalent) using this substance: metal with corrosive coating.
Five examples of PBBs using this substance: flame retardant, PCB, connector, plastic shell.
6 PBDE examples of using this substance: flame retardant, PCB, connector, plastic shell.
Test principle:
According to the EU WEEE &；; RoHS directive requires AOV to classify products according to materials and detect harmful substances with different materials. Generally speaking:
6? 1 Metal materials need to detect four harmful metal elements, such as (cadmium, cadmium, lead, mercury, mercury, Cr6+ hexavalent chromium).
6? 1 In addition to these four harmful heavy metal elements, brominated flame retardants (PBDE) should also be tested for plastic materials.
6? 1 At the same time, packaging materials made of different materials also need to be tested for heavy metals (94/62/EEC).
The following are the upper limit concentrations of six harmful substances specified in RoHS:
Cadmium: less than 100ppm
Lead: less than 1000ppm
Less than 2500ppm in steel alloy
Less than 4000ppm in aluminum alloy
Less than 40000ppm in copper alloy
Mercury: less than 1000ppm
Hexavalent chromium: less than 1000ppm
1. What is RoHS?
RoHS is the abbreviation of restricting the use of certain harmful substances in electronic and electrical equipment.
2. What are the harmful substances?
RoHS-* * lists six harmful substances, including lead Pb, cadmium Cd, mercury Hg, hexavalent chromium Cr6+, PBDE and PBB.
3. Why launch RoHS?
In 2000, when cadmium was found in the cables of some game machines sold in the Dutch market, people first noticed that electrical and electronic equipment contained heavy metals harmful to human health. In fact, solder and ink printed on packaging boxes widely used in the production of electrical and electronic products all contain harmful heavy metals such as lead.
4. When will 4.RoHS be implemented?
The EU will implement RoHS on July 1 2006. At that time, electrical and electronic products using or containing heavy metals and flame retardants (such as PBDE and PBBs) will not be allowed to enter the EU market.
5. What products does 5.RoHS specifically involve?
RoHS is aimed at all electrical and electronic products that may contain the above six harmful substances in the production process and raw materials, mainly including: white goods, such as refrigerators, washing machines, microwave ovens, air conditioners, vacuum cleaners, water heaters, etc. Black household appliances, such as audio-visual products, DVDs, CDs, TV receivers, IT products, digital products, communication products, etc. Power tools, electric electronic toys and medical electrical equipment
6. What is the current progress of 6.RoHS?
Some big companies have noticed RoHS and started to take countermeasures. For example, Sony's digital camera, the box has indicated that this product uses lead-free welding; Print with lead-free ink.
In 2004, the Ministry of Information Industry also promulgated the Administrative Measures for Pollution Prevention and Control of Electronic Information Products, which is similar to RoHS, and established the Working Group on Pollution Prevention and Control Standards of Electronic Information Products in 10 to study and establish a standard system for pollution prevention and control of electronic information products in line with China's national conditions. Carry out the research and revision of the relevant standards for pollution prevention and control of electronic information products, especially accelerate the formulation of basic standards such as materials, processes, terms, test methods and test means that are urgently needed by the industry.