RoHS advice in the number of harmful substances know how much
July 1, 2016, the "restrictions on the use of hazardous substances in electrical and electronic products management approach" (ie, China RoHS 2.0) formally implemented. February 2006 announced the "electronic information products pollution control approach" at the same time abolished. This means that all future sales of electronic products in the country, should be marked in China RoHS control of the six substances content.
Newly revised RoHS wide range of applications to make a substantial expansion, compared to the old version of China RoHS only contains 10 categories of electronic information products (excluding white goods such as air conditioners, refrigerators, washing machines), the new version of RoHS 2.0 covers almost all the electronic Electrical products.
At present for the management of the scope of the product, are required in accordance with SJ / T 11364-2014 standard requirements and identification. Products included in the compliance management catalog must also meet the limits of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, PBDEs and other hazardous substances specified in the GB / T 26572-2011 standard. So how much do you know about these harmful substances, then the alpha lab and you to explore these harmful substances and their harmful.
Substance upper limit concentration application example
Lead (Pb) <1000ppm solder, glass, PVC stabilizer
Cadmium (Cd) <100ppm switch, spring, connector, housing and PCB, contacts, battery
Mercury (Hg) <1000ppm Thermostats, Sensors, Switches and Relays, Lamps
Hexavalent chromium (Cr6 +) <1000ppm Metal anti-corrosion coating
Polybrominated biphenyls (PBB) <1000ppm Flame retardants, PCB, connectors, plastic housing
Polybrominated diphenyl ethers (PBDE) <1000ppm Flame retardants, PCB, connectors, plastic housing
What is the harm of these substances?
1. Heavy metal lead hazards: the specific performance of the impact of intellectual development and bone development, resulting in indigestion
And endocrine disorders, leading to anemia, high blood pressure and arrhythmia, destruction of renal function and immune function.
2. Damage to heavy metal cadmium (Cd): damage to the nervous system, ingestion can cause acute cecalitis, cadmium in the kidneys and bones will replace the bone calcium, so that the bone seriously softened. The biological half-life of cadmium in human body is 20 to 40 years, cadmium on human tissue and organ toxicity is multifaceted, and the treatment is extremely difficult.
3. Heavy metal mercury (Hg) Hazard: mercury that is mercury, is a liquid metal, can be evaporated at room temperature, the steam colorless and tasteless, heavier than air. If people eat 0.1 g of mercury will be poisoned to death. Mercury and its compounds can penetrate the body through different ways such as the respiratory tract, skin or digestive tract. When the mercury into the human body, that is gathered in the liver, kidney, brain, heart and bone marrow and other parts, resulting in neurological poisoning and deep tissue lesions.
4. Crude chromium (Cr6 +) hazards: to steam or dust into the body, will cause nasal septum perforation, gastrointestinal disorders, leukopenia, similar to asthma lung disease. Drinking water exceeded 400 times when the mouth will have erosion, diarrhea, indigestion and other symptoms, severe cases may have a short shock phenomenon.
5. Dibrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE) hazards: brominated flame retardants will affect the internal system and the growth of the fetus.
These harmful substances in the electronic product once the specified standard is not allowed to enter the market, even if lucky to enter the market, was found after exposure to the negative impact on the enterprise and the loss is immeasurable. RoHS certification is to give a product identity is also a competitive advantage of the enterprise, so to do RoHS certification products are of great significance.
According to the EU WEEE & RoHS directive, the domestic qualified third party testing organization is the product according to the material to split, with different materials were detected harmful substances. In general, metal materials need to test four kinds of harmful metal elements such as (Cd cadmium / Pb lead / Hg mercury / Cr6 + hexavalent chromium) and plastic materials in addition to check the four harmful heavy metal elements, the need to detect brominated flame retardants Polybrominated biphenyls PBB / PBDE PBDE) also requires the packaging of heavy metals for packaging materials (94/62 / EEC) for different materials.
