RoHS

RoHS is a mandatory standard established by EU legislation, and its full name is the "Restriction of Hazardous Substances" directive. This standard has been officially implemented since July 1, 2006, mainly used to standardize the material and process standards of electronic and electrical products, making them more conducive to human health and environmental protection. The purpose of this standard is to eliminate six substances, including lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers (note: the correct Chinese name for PBDE refers to polybrominated diphenyl ethers, which is an incorrect statement), from motor and electronic products, and specifically stipulates that the lead content cannot exceed 0.1%.

ROHS Overview and Requirements:

Restricted toxic substances:

·Heavy metals:

-Lead lead;

-Mercury mercury;

-Cadmium;

-Chromium (VI) hexavalent chromium

·Some brominated flame retardants:

Polybrominated biphenyls (PBB's);

Polybrominated diphenyl ethers (PBDE's)

The maximum limit indicator is:

·Cadmium: 0.01% (100 ppm);

·Lead, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers: 0.1% (1000 ppm)

The RoHS directive restricts the use of the following six types of hazardous substances

1. Examples of lead (Pb) using this substance: solder, glass, PVC stabilizer

2. Mercury (Hg) (Mercury) Examples of using this substance: thermostats, sensors, switches and relays, light bulbs

3. Examples of using cadmium (Cd): switches, springs, connectors, housings and PCBs, contacts, batteries

4. Hexavalent chromium (Cr 6+) Example of using this substance: Metal corrosion coating

5. Examples of using polybrominated biphenyls (PBBs) include flame retardants, PCB、 Connectors, plastic casing

6. Examples of using polybrominated diphenyl ethers (PBDE): flame retardants, PCB、 Connectors, plastic casing

Testing principle:

According to the EU WEEE&RoHS directive, CES separates products based on their materials and conducts testing for harmful substances using different materials. Generally speaking:

·Metal materials need to be tested for four harmful metal elements, such as Cd, cadmium, Pb, lead, Hg, mercury, Cr6, and hexavalent chromium

·In addition to checking for these four harmful heavy metal elements, plastic materials also need to be tested for brominated flame retardants (PBB/PBDE)

·At the same time, packaging materials of different materials also need to be tested for heavy metals separately (94/62/EEC)

The following are the upper limit concentrations for six hazardous substances specified in RoHS:

Cadmium: less than 100ppm

Lead: less than 1000ppm

Less than 3500ppm in steel alloy

Less than 4000ppm in aluminum alloy

Less than 40000 ppm in copper alloy

Mercury: less than 1000ppm

Hexavalent chromium: less than 1000ppm

Reasons for Introducing RoHS

The first time it was noticed that electrical and electronic equipment contained heavy metals harmful to human health was in 2000 when cadmium was found in the cables of a batch of game consoles sold in the market in the Netherlands. In fact, the soldering and packaging printing inks widely used in the production of electrical and electronic products currently contain harmful heavy metals such as lead.

When will RoHS be implemented

The European Union will implement RoHS on July 1, 2006. Electrical and electronic products that use or contain heavy metals and flame retardants such as PBDE and PBB will not be allowed to enter the EU market if their limits exceed the standard

Scope of application of ROHS certification

27 member states of the European Union: France, Germany, Italy, Netherlands, Belgium, Luxembourg, United Kingdom, Denmark, Ireland, Greece, Spain, Portugal, Austria, Sweden, Finland, Cyprus, Hungary, Czech Republic, Estonia, Latvia, Lithuania, Malta, Poland, Slovakia, Slovenia, Bulgaria, Romania.

What products are specifically involved in RoHS

RoHS targets all electrical and electronic products that may contain the six harmful substances mentioned above in their production processes and raw materials, including daily household appliances such as refrigerators, washing machines, microwaves, air conditioners, vacuum cleaners, water heaters, etc; Black household appliances, such as audio and video products, DVD，CD， TV receivers, IT products, digital products, communication products, etc; Electric tools, electric electronic toys, medical electrical equipment

Related products