RoHS certification

RoHS is a mandatory standard enacted by EU legislation, and its full name is the Restriction of Hazardous Substances (Restriction of Hazardous Substances). The standard was officially implemented on July 1, 2006. It is mainly used to standardize materials and process standards for electrical and electronic products, making it more conducive to human health and environmental protection. The purpose of this standard is to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers in motor electronics (note: the correct Chinese name for PBDE refers to polybrominated diphenyl ethers, and polybrominated diphenyl ethers are wrong. A total of 6 substances, with a focus on the lead content of not more than 0.1%.

ROHS summary, requirements:

Restricted toxic substances:

·Heavy metal:

-Lead lead;

-Mercury mercury;

-Cadmium cadmium;

-Chromium (VI) hexavalent chromium.

· Some brominated flame retardants:

Polybrominated biphenyl-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 categories of hazardous substances

1. Lead (Pb) Examples of the use of this material: solder, glass, PVC stabilizer

2. Mercury (Hg) (mercury) Examples of the use of this substance: thermostats, sensors, switches and relays, bulbs

3. Cadmium (Cd) Examples of the use of this substance: switches, springs, connectors, housings and PCBs, contacts, batteries

4. Hexavalent chromium (Cr 6+ ) Example of the use of this material: metal with corrosion coating

5. Polybrominated biphenyls (PBB) Examples of the use of this substance: flame retardants, PCBs, connectors, plastic housings

6. Polybrominated diphenyl ether (PBDE) Examples of the use of this substance: flame retardants, PCBs, connectors, plastic housings

Test principle:

According to the requirements of the EU WEEE & RoHS directive, CES separates the products according to the materials and tests the harmful substances with different materials. Generally speaking:

· Metal materials need to test four harmful metal elements such as (Cd cadmium / Pb lead / Hg mercury / Cr6 + hexavalent chromium)

·In addition to checking these four harmful heavy metal elements, plastic materials need to detect brominated flame retardants (polybrominated biphenyl PBB/polybrominated biphenyl ether PBDE)

·At the same time, different materials must be tested separately for heavy metals in packaging materials (94/62/EEC)

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

Cadmium: less than 100ppm

Lead: less than 1000ppm

Less than 3500ppm in steel alloy

Less than 4000ppm in aluminum alloy

Less than 40,000 ppm in copper alloy

Mercury: less than 1000ppm

Hexavalent chromium: less than 1000ppm

Reasons for launching RoHS

For the first time, it was noted that electrical and electronic equipment contained heavy metals that were harmful to human health. In 2000, cadmium was found in cables in a number of marketed gaming machines in the Netherlands. In fact, the solder and box-printing inks that are currently in large use in the production of electrical and electronic products contain harmful heavy metals such as lead.

When to implement RoHS

The EU will implement RoHS on July 1, 2006, when the limits of electrical and electronic products using or containing heavy metals and PBDE, PBB and other flame retardants will not allow entry into the EU market.

RoHS certification scope

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.

Which products are specifically covered by RoHS?

RoHS is an electrical and electronic product that may contain the above six hazardous substances in all production processes and raw materials, including: daily household appliances such as refrigerators, washing machines, microwave ovens, air conditioners, vacuum cleaners, water heaters, etc.; black appliances, such as audio and video products. , DVD, CD, TV receiver, IT products, digital products, communication products, etc.; power tools, electric electronic toys, medical electrical equipment

Current RoHS progress

Some big companies have noticed RoHS and started to take countermeasures. For example, SONY's digital cameras have been stated on the box: this product uses lead-free soldering; it is printed with lead-free ink.

In 2004, the Ministry of Information Industry also issued the "Measures for the Prevention and Control of Pollution Prevention of Electronic Information Products" similar to RoHS. In October, the "Working Group on Pollution Prevention Standards for Electronic Information Products" was established to study and establish pollution of electronic information products in line with China's national conditions. Standards for prevention and control; carry out standard research and revision work related to pollution prevention and control of electronic information products, especially accelerate the formulation of basic standards such as materials, processes, terminology, test methods and test methods that are urgently needed in the industry.

On July 1, 2011, the European Union issued a new version of the RoHS Directive - Directive 2011/65/EU in the Official Gazette (OJ).

As a very familiar instruction of China's electrical and electronic products manufacturing companies, its introduction process can be described as twists and turns. Due to the large differences between the parties in the revision process, the amendments originally intended to be introduced in 2009 have been delayed. In particular, whether to expand the scope of products and the scope of restricted substances, the EU, including the committee, the European Parliament, the Council, the industry, NGOs, etc. have engaged in heated debates.

The 2011/65/EU is different from the original RoHS Directive 2002/95/EU mainly in:

1. Expanded product range: All electrical and electronic products are covered by the scope of the directive (including cables and spare parts), but new Class 8 medical devices and Category 9 monitoring are added. And a certain transition period between control instruments (including industrial monitoring instruments), in addition, 20 exemptions are given for these two types of products (listed in Annex IV)

2. Clear up some definitions

3. The scope of the controlled substances has not been expanded, and the original limit requirements of the original six substances have been maintained. However, in the course of future review, substances including DEHP should be given priority to investigate and control the future. Material range paving

4. Removed the producer regulations and added "manufacturer", "authorised representative", "importer", "distributor" Definition and clearly defined its responsibilities

5. The relevant matters concerning the CE mark and the CE mark are stipulated in the product.

This directive will take effect on the 20th day of the OJ, and member states will need to convert it into national law by January 2, 2013.

The release of 2011/65/EU will have a certain impact on China's electrical and electronic product manufacturing companies, especially for the inclusion of medical device products, surveillance and control instrument products in the scope of regulation, so these two types of manufacturing enterprises The impact will be very huge

In addition, since the CE mark is required on electrical and electronic products, it is a huge challenge for the industry to comply with the requirements of the directive.

Commonly used RoHS detection methods

1. Anion: Inline Technology Ion Chromatography

Directly enter ion chromatography for analysis after oxygen bomb combustion and indigo technology pretreatment

2. Cation and its valence:

It can be detected by inline cation chromatography, ion selective electrode method and atomic absorption method.

Determination of the valence state of cationic elements by voltammetric polarography

The pronunciation of RoHS. /rous/

For the detection method, refer to the procedure for determining the concentration of six restricted substances in IEC62321:2008 electrical and electronic products.

A. First of all, non-destructive screening with XRF is fast, efficient, non-destructive and low cost. However, there are many interference factors and large errors.

B. Determination of Pb, Cd, Hg concentration by AAS or ICP-AES after microwave digestion and acid digestion.

C. After Soxhlet extraction, the concentrations of polybrominated biphenyls, polybrominated diphenyl ethers, etc. were determined by GC-MS.

D. Determine the concentration of the colorless surface layer Cr6+ by point test or boiling water extraction, or use EPA3060A test with UV-Vis spectrophotometer.

RoHS certification

RoHS is a mandatory standard enacted by EU legislation, and its full name is the Restriction of Hazardous Substances (Restriction of Hazardous Substances). The standard was officially implemented on July 1, 2006. It is mainly used to standardize materials and process standards for electrical and electronic products, making it more conducive to human health and environmental protection. The purpose of this standard is to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers in motor electronics, with a focus on lead levels not exceeding 0.1%. The main sources of lead involved are the following categories.

Basic content of EU RoHS and WEEE directives

On February 13, 2003, the European Parliament and the European Commission issued the "Waste Electrical and Electronic Equipment" Equipment Directive (the "WEEE Directive") and the "Electric and Electrical Equipment Restriction of the Use of Certain Hazardous Substances Directive" in its Official Gazette. Referred to as "RoHS Directive"

The "RoHS Directive" and the "WEEE Directive" stipulate that there are 10 categories of 102 kinds of products that are included in the management of hazardous substances and management of waste recycling. The first seven products are the main export electrical products in China. Including large household appliances, small household appliances, information and communication equipment, consumer products, lighting equipment, electrical and electronic tools, toys, leisure and sports equipment, medical equipment (except for implanted or infected products), monitoring and control instruments ,vending machine.

On December 3, 2008, the EU issued a revised proposal for the WEEE Directive (2002/96/EC) and the RoHS Directive (2002/95/EC). The purpose of this proposal is to create a better regulatory environment that is simple, understandable, effective and enforceable. The main contents of the revision of the RoHS Directive are:

1. Changed the legal term to clarify the scope and definition of the directive

2. CE mark and EC declaration of conformity of the introduced product

3. Incorporate medical devices, control and monitoring instruments into the scope of the RoHS Directive in phases;

4. The six hazardous substances that have been restricted have not changed, but the four substances - HBCDDD, 2-ethylhexyl phthalate (DEHP), butyl benzyl phthalate (BBP) and dibutyl phthalate (DBP) - require priority assessment to investigate whether future inclusion of restricted substances

RoHS range:

Only for new products launched on the market from July 1, 2006.