亚洲国产成人av网站-综合色就爱涩涩涩综合婷婷-全部露出来毛走秀福利视频-丰满人妻一区二区三区视频

Welcome to the official website of Legret Metal Company
Focus on electronic welding for 20 yearsDONGGUAN LEGRET METAL.,LTD
National consultation hotline:135-2799-2739
Contact US
mobile phone: 135-2799-2739
Service hotline: 0769-38893080
Email: lzd@dglzd.com
Address: Dongguan lvzhidao Metal Co., Ltd
Contact person: Manager Zeng
Industry information

Is solder toxic? Will it do harm to human body? How to prevent it?

作者:Lvzhidao solder factory 2021-05-17 0

Is solder toxic? Is it lead poisoning?


In fact, it depends on whether there is lead solder wire or lead-free solder wire used in the work. It needs to check blood lead regularly. If there is no excess, there will be no problem.


Is solder toxic?


Normally speaking, if the protection and raw materials are purchased according to national standards, solder will not cause significant harm. Now, lead-free products are basically used.


Lead metal may produce lead compounds, all classified as dangerous substances, in human body lead will affect the central nervous system and kidney, lead on some biological environmental toxicity has been widely confirmed.


Blood lead concentration up to 10 μ If exposed for a long time, the blood lead concentration will exceed 60-70 μ G/dl can cause clinical lead poisoning.


Lead must be toxic, first don't worry about his big, that is, general metal, more will also be poisoned.


It is better to wear masks when working, but it will have an impact. Lead free solder wire, will be more safe than lead.


Is lead-free solder toxic?


Tin and lead alloy, commonly used solder, has good conductivity and low melting point, which has been used in welding process for a long time. The toxicity of solder mainly comes from lead, and lead smoke produced by solder is easy to lead poisoning.


In short: solder, containing about 60% lead, 40% tin, so solder itself is toxic. In addition, when the flux in the solder wire meets the high temperature electric soldering iron, the gasification will occur and smoke will be formed. Because the solder wire additives contain rosin and chemical raw materials, long-term inhalation of this smoke will have adverse effects on human body. The main hazard factor in welding is lead smoke, even lead-free solder, and many of them contain certain lead.


The limit value of lead smoke in national occupational health standard gbz2-2002 is very low, and it is very toxic. It needs to be protected and will damage human body and environment. Employees can usually see what the tin is assigned and which type of tin is, so that it can be checked and required to be rectified by the enterprise (opinions can be given to the internal trade union of the factory). If the tin is lead-containing, it must be harmful to the body for a long time. They accumulate in the body and damage the immune system greatly. Lead free solder wire is environmentally friendly, but it is harmful to human body. The lead content of lead-free solder wire is not without lead, but compared with the lead-containing solder wire, the influence of lead-free solder wire on environment and human body is smaller than that of lead-containing solder wire.


How to prevent the toxic of soldering tin wire of electric soldering iron?


First, PCB factory uses RoHS tin wire as much as possible when welding components with electric soldering iron, and precautions shall be done:


1. Gloves, masks or gas masks shall be worn during work;


2. Pay attention to ventilation in the workplace;


3. Pay attention to cleaning after work;


主站蜘蛛池模板: 久热这里只有精品视频6| 国产精品日韩av在线播放| 欧美尺寸又黑又粗又长| 日韩丰满少妇无吗视频激情内射| 国产v亚洲v天堂a无码99| 国产日韩精品欧美一区| avtt天堂网久久精品| 白嫩少妇bbw撒尿视频| 欧美色图片区| 夜夜爽8888免费视频| 艳妇乳肉豪妇荡乳xxx| 成人免费无码大片a毛片抽搐色欲| 性色av极品无码专区亚洲| 国产 麻豆 日韩 欧美 久久 | 色偷偷成人网免费视频男人的天堂| 老司机亚洲精品影院| 亚洲成a人在线看天堂无码| 伊人色综合一区二区三区| 国产午夜无码福利在线看网站| 欧美日韩久久中文字幕| 亚洲狠狠婷婷综合久久久久图片 | 亚洲va无码手机在线电影| 国产伦精品一区二区三区妓女| 日韩精品无码一区二区三区av| 欧美激情一区二区三区在线| 亚洲一区二区三区国产精华液| 欧美性猛交xxxx免费看蜜桃| 久久综合给合久久狠狠狠97色69| 在线观看免费a∨网站| 亚洲日韩精品欧美一区二区一 | 欧美牲交a欧美牲交aⅴ久久 | 少妇被爽到高潮动态图| 色久悠悠婷婷综合在线亚洲| 久久人妻少妇嫩草av| 亚洲欧美18岁网站| 欧美黑人粗大xxxxbbbb| 国产产无码乱码精品久久鸭| 国产99在线 | 亚洲| 男人扒开女人双腿猛进视频| 亚洲成a人片在线观看www| 三人弄娇妻高潮|