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淺析三防漆涂覆的必要性

湖北快3TIME:2018-01-30

標簽:PCBA元器件涂覆工藝三防漆涂覆標準

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CHANGJIANDEHUANJINGYINSURUSHIDU、FENCHEN、YANWU、MEIJUNDENGHUIYINQIDEPCBAGEZHONGSHIXIAOWENTICHANSHENG

濕度

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  1. 當大氣中RH達到80%時,會有5~20個分子厚的水膜,各種分子都可自由活動,當有碳元素存在,可能產生電化學反應;
  2. 當RH達到60%時,設備表面層會形成2~4個水分子厚的水膜,當有污染物溶入時,會有化學反應產生;
  3. 當大氣中RH<20%時,幾乎所有腐蝕現象都停止;

YINCI,FANGCHAOSHIBAOHUCHANPINDEZHONGYAOYIHUAN。

DUIDIANZISHEBEIERYAN,CHAOSHISHIYISANZHONGXINGSHICUNZAI:YUSHUI,LENGNINGHESHUIQI。SHUISHIDIANJIEZHI,NENGRONGJIEDALIANGDEFUSHIXINGLIZIDUIJINSHUCHANSHENGFUSHI。DANGSHEBEIDEMOUYICHUDEWENDUDIYU“LUDIAN”(WENDU)SHI,GAICHUBIAOMIAN:JIEGOUJIANHUOPCBAHUIYOUNINGLUCHANSHENG。

粉塵

湖北快3DAQIZHONGCUNZAIFENCHEN,FENCHENXIFULIZIWURANWUCHENJIANGYUDIANZISHEBEIDENEIBUERZAOCHENGGUZHANG。ZHESHIYEWAIDIANZISHEBEISHIXIAODEGONGTONGZHICHU。

湖北快3FENCHENFENWEILIANGZHONG:CUFENCHENSHIZHIJINGZAI2.5~15WEIMIDEBUGUIZEKELI,YIBANBUHUIYINQIGUZHANG,DIANHUDENGWENTI,DANYINGXIANGLIANJIEQIDEJIECHU;XIFENCHENSHIZHIJINGXIAOYU2.5WEIMIDEBUGUIZEKELI,XICHENLUOZAIPCBA(DANBAN)SHANGYOUYIDINGDEFUZHULI,XUTONGGUOFANGJINGDIANSHUACAIKECHUQU。

FENCHENDEWEIHAI:a.YOUYUFENCHENCHENJIANGZAIPCBABIAOMIAN,CHANSHENGDIANHUAXUEFUSHI,GUZHANGLVZENGJIA;b.FENCHEN SHIRE YANWUDUIPCBASUNHAIZUIDA,YANHAI、SHAMO(YANJIANDI)、HUAIHEYINANMEIYUJIJIEHUAGONG、KUANGQUFUJINDIQU,DIANZISHEBEIGUZHANGZUIDUO。

湖北快3YINCI,FANGCHENSHIBAOHUCHANPINDEZHONGYAOYIHUAN。

鹽霧

湖北快3YANWUDEXINGCHENG:YANWUSHIHAILANG、CHAOXIJIDAQIHUANLIU(JIFENG)QIYA、RIZHAODENGZIRANYINSUZAOCHENG,HUISUIFENGPIAOLUOZHINEILU,QINONGDUSUILIHAIANJULIERDIJIAN,TONGCHANGLIHAIAN1KmCHUWEIANBIANDE1%(DANTAIFENGQIHUICHUIXIANGGENGYUAN)。

湖北快3YANWUDEWEIHAIXING:a.SHIJINSHUJIEGOUJIANDUCENGPOHUAI;b.JIASUDIANHUAXUEFUSHISUDUDAOZHIJINSHUDAOXIANDUANLIE、YUANQIJIANSHIXIAO。

LEISIDEFUSHIYUAN:a.SHOUHANZHONGYOUYAN、NIAOSU、RUSUANDENGHUAXUEWUZHI,DUIDIANZISHEBEIHUICHANSHENGYUYANWUTONGYANGDEFUSHIZUOYONG,YINCIZAIZHUANGPEIHUOSHIYONGGUOCHENGZHONGYINGDAISHOUTAO,BUKELUOSHOUCHUMODUCENG;b.HANJIZHONGYOULUSUJISUANXINGWU,YINGJINXINGQINGXI,BINGKONGZHIQICANLIUNONGDU。

YINCI,FANGYANWUSHIBAOHUCHANPINDEZHONGYAOYIHUAN。

霉菌

MEIJUN,SHISIZHUANGZHENJUNDESUCHENG,YIJI"FAMEIDEZHENJUN",TAMENWANGWANGNENGXINGCHENGFENZHIFANMAODEJUNSITI,DANYOUBUXIANGMOGUNEIYANGCHANSHENGDAXINGDEZISHITI。ZAICHAOSHIWENNUANDEDIFANG,HENDUOWUPINSHANGCHANGCHUYIXIEROUYANKEJIANDERONGMAOZHUANG、XUZHUANGHUOZHUWANGZHUANGDEJUNLUO,NEIJIUSHIMEIJUN。

湖北快3MEIJUNDEWEIHAI:a.MEIJUNTUNSHIHEFANZHISHIYOUJICAILIAOJUEYUANXINGXIAJIANG,SUNHUAIERSHIXIAO;b.MEIJUNDEDAIXIECHANWUSHIYOUJISUAN,YINGXIANGJUEYUANXINGJIKANGDIANQIANGDUERCHANSHENGDIANHU。

湖北快3YINCI,FANGMEIJUNSHIBAOHUCHANPINDEZHONGYAOYIHUAN。

湖北快3ZONGHEYISHANGJIFANGMIANLAIKAOLV,CHANPINDEKEKAOXINGYAOYOUGENGHAODIBAOZHENG,BIXUJIANGQIYUWAIJIEHUANJINGJINKENENGDIGELIKAILAI,YINCIYINRULEFUXINGTUFUGONGYI。

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JINGGUOTUFUGONGYIHOUDEPCB,ZAIBIAOMIANXINGCHENGTOUMINGDEBAOHUMO,NENGYOUXIAOFANGZHISHUIZHUHECHAOQIQINRU,BIMIANLOUDIANHEDUANLU。

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