Desktop | 87/100 | ✔ |
Mobile | 81/100 | ✔ |
Field | Data | Result |
---|---|---|
Page Size | 45 KB | ✔ |
Compression | 11 KB (-76.4%) | ✔ |
Text/Html Ratio | 10460 / 46456 (bytes) = 22.52% | ✔ |
Load Time | 1.99 second | ✘ |
Mobile Ready | 0/100 | ✘ |
In-Page Links | 88 | ✔ |
Doc Type | XHTML 1.0 Transitional | ✔ |
Encoding | UTF-8 | ✔ |
Declared Language | Unknown | ✘ |
Preferred Domain | No | ❗ |
Robots.txt | Yes | ✔ |
Url Rewrite | Yes | ✘ |
Underscores in url | No | ✔ | Images Without ALT | 22 / 38 | ✘ |
Embedded Objects (Desktop) | No | ✔ |
Embedded Objects (Mobile) | No | ✔ |
Iframe | No | ✔ |
Custom 404 page | No | ✘ |
Email Privacy | No | ✘ |
Gsafe browsing | Yes | ✔ |
Analytics | No | ✘ |
W3C Validity | No | ✘ |
Keywords | Freq | Title | Desc | <H> |
---|---|---|---|---|
行业资讯 | 2 | ✘ | ✘ | ✘ |
常见问题 | 2 | ✘ | ✘ | ✘ |
laval | 2 | ✘ | ✘ | ✘ |
为您提供板式换热器领域的系统解决方案 | 1 | ✘ | ✘ | ✘ |
板式换热器在石油、化工、轻工、制药、能源等工业生产中都有广泛的运用,在长时间使用后,其管内不可避免的会出现腐蚀的情况,这与水质不纯、大气对水的污染、管内壁面状况以及水流速大小等因素均有着密切关系。由于管内壁结垢附着物(氧化铁、钙盐沉积物、污泥物等)的存在,经常出现板式换热器管的局部腐蚀和点蚀的情况,主要原因有以下几点: 一、水室侧管板表面的腐蚀。 板式换热器位于水室侧管板表面,特别是管四周表面也会产生电化学腐蚀,这种腐蚀痕迹呈斑块状。 板式换热器管内产生腐蚀的原因 二、水侧管内壁的局部侵蚀。 当含有污物、空气、亚硫酸气的冷水(或冷却水)急速流过金属管内时,会冲破管内表面上的一层耐腐蚀保护膜。在管保护膜剥离的表面,由于金属离子浓度差,形成阳极(金属离子少的部位)和阴极(金属离子多的部位)的电化学腐蚀,产生此种腐蚀的管内表面上会呈现鱼鳞坑凹状并带有细小斑点。 三、水侧管内壁的点蚀和孔蚀。 板式换热器管水侧的腐蚀多是在水垢或其他附着物不均匀覆盖的情况下产生的。对铜及其合金,当管内壁表面附有多孔性的污泥、泥砂时,会造成氧浓度差电池的另一种电化学腐蚀。例如,当冷水或冷却水中含有铜离子时,就会产生电池,使铜离子镀在铁上并产生点蚀和孔蚀现象,即镀铜现象。 | 1 | ✘ | ✘ | ✘ |
微信咨询 | 1 | ✘ | ✘ | ✘ |
研发与创新 | 1 | ✘ | ✘ | ✘ |
br板式换热器 | 1 | ✘ | ✘ | ✘ |
公司简介 | 1 | ✘ | ✘ | ✘ |
产品展示 | 1 | ✘ | ✘ | ✘ |
备件与服务 | 1 | ✘ | ✘ | ✘ |
厂区展示 | 1 | ✘ | ✘ | ✘ |
发货现场 | 1 | ✘ | ✘ | ✘ |
在线留言 | 1 | ✘ | ✘ | ✘ |
板式换热器 | 1 | ✘ | ✘ | ✘ |
With 1.99 seconds in page load, 45 KB of page size and all other reports below, the 2tards.com has a SEO score of 51 out of 100 |
Title | 5分pk拾-官网 |
Description | 5分pk拾官网是由福利彩票发行管理中心主办的5分pk拾网址,涵盖啦5分pk拾平台,5分pk拾app,5分pk拾下载,5分pk拾注册,5分pk拾登录,5分pk拾开户,5分pk拾投注,5分pk拾购彩,5分pk拾计划技巧,手机版邀请码。 |
Keyword | 5分pk拾 |
Age | 0 Years, 5 Days |
Created | 6th-Dec-2020 |
Updated | 7th-Dec-2020 |
Expiry | 6th-Dec-2021 |
Host | Type | Ttl | Other |
---|---|---|---|
2tards.com | A | 504 | ip:45.81.4.79 |
2tards.com | NS | 86400 | target:jm1.dns.com |
2tards.com | NS | 86400 | target:jm2.dns.com |
2tards.com | SOA | 600 | mname:jm1.dns.comrname:admin.dns.comserial:1607326104refresh:7200retry:3600expire:1209600minimum-ttl:1800 |
You have exceeded your access quota. Please try again later. |
Server IP | 45.81.4.79 |
Server Location | United States |
Service Provider | DediPath |
Domains (TLD) | Status |
---|---|
2tards.net | Available |
2tards.org | Available |
2tards.biz | Already Registered |
2tards.io | Already Registered |
2tards.info | Available |
Domains (TLD) | Status |
---|---|
qtards.com | Already Registered |
wtards.com | Available |
etards.com | Already Registered |
2rards.com | Available |
2fards.com | Available |
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