精品国产免费久久久久久,99视频九九精品视频在线观看,免费的视频网站入口,久久国内,福利视频亚洲,h小视频在线观看网

Scan code consultation:
0755-2102 2109
Service
Current location: Home Service Corrosion protection
What is the classification of anti-corrosion grade C5?

SINO Testing Services

| 2024-12-05|Return

In 1998, the International Organization for Standardization (ISO) introduced ISO12944 (Corrosion Protection of Steel Structure Protective Coating Systems), which is an international common standard. ISO12944-2017 is a reference provided by the International Organization for Standardization for global anti-corrosion technicians and units.

The atmospheric environment is divided into six levels of atmospheric corrosiveness:

C1 has very low corrosiveness

Low corrosiveness of C2

C3 moderate corrosiveness

C4 high corrosiveness

C5 has very high corrosiveness

CX extreme corrosiveness

Immersion in water or buried in soil is classified into four levels:

Im1 freshwater

Im2 seawater or brackish water without cathodic protection

Im3 soil

Im4 seawater or brackish water with cathodic protection


Related Recommendations
Contact us
0755-2102 2109
Add: 13F, Building C, Kangjia Guangming Technology Center, No. 288 Xingxin Road, Guangming District, Shenzhen
Follow us
Copyright: Shenzhen Zhongnuo Testing Technology Co., Ltd. 粵ICP備18004888號
Service Hotline
18924609560
點擊這里給我發消息 1354407946
點擊這里給我發消息 1354407946
主站蜘蛛池模板: 久久久久久99 | 开心久久婷婷综合中文字幕 | 亚洲精品免费在线 | 99亚洲视频 | 精品啪啪| 日韩欧美中 | 久久精品国产99国产精品亚洲 | 人成电影网在线观看免费 | 涩色婷婷狠狠第四四房社区奇米 | 国产成人综合在线视频 | 六月天丁香婷婷 | 日本激情在线观看 | 97在线视| 九九爱这里只有精品 | 99精彩视频在线观看 | 色五月激情五月 | 久久99精品麻豆国产 | 天天五月天丁香婷婷深爱综合 | 国产一区免费视频 | 国产日韩欧美一区二区三区在线 | 国产精品视频导航 | 天堂网男人 | 国产成人精品久久免费动漫 | 国产精品成人一区二区1 | 久久电影网午夜鲁丝片免费 | 欧美曰逼视频 | 婷婷六月激情 | 成人精品亚洲人成在线 | 国产午夜精品一区二区三区不卡 | 三上悠亚一区二区观看 | 国产高清在线精品一区二区 | 婷婷四房综合激情五月在线 | 97精品在线播放 | 看视频免费 | 精品久久久中文字幕一区 | 欧美在线观看视频一区 | 欧1州区2区3区4区产品 | 久久这里只有精品免费播放 | 久久这里只有精品免费播放 | 欧美性69| www.蜜桃av.com |