Tungsten hexafluoride (WF6) at different temperatures as a colorless, transparent bromine gas or liquid, the molecules have a symmetrical octahedron structure at room temperature. When it contact water it will quickly hydrolyzed and produce hydrogen fluoride and tungsten trioxide, so the tungsten hexafluoride has similar toxicity with HF in the air. Therefore, during the operation of tungsten hexafluoride the works should to wear chemical protection suits and wearing gas masks.
If during the operation the skin comes into contact with the tungsten hexafluoride should be stripped of contaminated clothing, rinse with running water. In the burning wound coated magnesium oxide ointment or glycerin dilute ammonia, and timely medical treatment. If eye contact with WF6 should immediately open the upper lower eyelid, with a large number of mobile water thoroughly washed after 15 minutes for medical treatment. If you are not careful inhalation, you should immediately from the scene to fresh air, if feel breathing difficulty should immediately oxygen therapy and go with medical treatment promptly and timely. If ingested, it will have to immediately mouthwash, drink milk or egg white, and timely medical treatment.

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The causes of tungsten points’ ablation of car distributor can be seen as follows:

3. Car engine working at a low speed during a long period. In case the car engine working at a low speed during a long period, the closure time of tungsten points will prolonged resulting from the decreased frequency of opening and closing, and lead to the increase of  self-induced electromotive force of the primary winding and the primary current, eventually tungsten points will ablate. To avoid these phenomenons, you should increase the tungsten points’ gap of distributor appropriately.

4. Bad capacitor work

Bad internal connection or bad connection between housing and ground will lead to bad capacitor work.
Checking way: using the way of disassembling capacitor to in contrast of high voltage electrical spark.

When you disconnect the power-off tungsten points, capacitor will absorb the surge voltage which is formed by the self-induced electromotive force of primary winding of the ignition coil to reduce spark discharge of tungsten points, and to avoid tungsten points being ablated, furthermore, improving the rate change of primary current, therefore, improving the high-pressure spark.


 

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 Tel.: 86 592 5129696; Fax: 86 592 5129797
 Email: sales@chinatungsten.com
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Tungsten hexafluoride is a colorless gas or light yellow liquid. Solid tungsten hexafluoride is a deliquescent white crystal, smoke in the moist air. Its physical properties are as follows: chemical formula: WF6, molecular weight: 297.8, boiling point: 17.5 ℃, melting point: 2.3 ℃, relative density: 3.44, and it is soluble in most organic solvents, and react with hydrofluoric acid to generate H2. Its CAS registry number is 7783-82-6 CAS system.
It is a toxic gas, for humans and the environment has a certain impact. If it contact with moist air or hydrolyzed will emit toxic and corrosive hydrogen fluoride gas, such gas will cause eye, skin, and mucous membranes very serious injury. At the same time the gas is highly corrosive and can erode almost all metals, can rapidly corrode glass. For WF6 on-site emergency monitoring can use speed measuring tube method and particle-selective electrode method. And laboratory monitoring can use ion selective electrode method and membrane fluoride ion selective electrode method.

Tungsten Manufacturer & Supplier: Chinatungsten Online -http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
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The reasons of tungsten contacts ablation of car distributor as follows:

3. Car engine running at low speed for a long time. If the car engine running at low speed for a long time, it will make tungsten contacts closure time prolonged due to the decreasing frequency of opening and closing, resulting in self-induced electromotive force of the primary winding increased and the primary current will also increased, eventually causing tungsten contacts ablation. To avoid the aforementioned phenomenon, tungsten contacts gap of distributor should be appropriately increased.

4. Bad capacitor work

The reason of bad capacitor work is that bad connection between housing and ground or bad internal connection.
Check method: adopting the method of disassembling capacitor to compare high voltage electrical spark.

When power-off tungsten contacts is disconnected, capacitor will absorb the surge voltage which is formed by the self-induced electromotive force of primary winding of the ignition coil to reduce spark discharge of tungsten contacts, so tungsten contacts can avoid being ablated , but also improve the rate of change of primary current, thereby enhancing the high-pressure spark.


 

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 Tel.: 86 592 5129696; Fax: 86 592 5129797
 Email: sales@chinatungsten.com
 Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
 Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
 Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn