![Low soluble anode groundings](http://pipe-st.com/images/bodyblock/5j5a0253-1.jpg)
![](http://pipe-st.com/images/bodyblock/img-1827-1.jpg)
The types
Low soluble coatings applied to the surface of anode grounding electrodes have a peculiar composition and, depending on application conditions, are subdivided into the following types:
- type 1: coating of mixed metal oxides for soil and fresh water
- type 2: coating of mixed metal oxides for seawater
- type 3: metallized coating
- type 4: coating of mixed metal oxides for fresh water and seawater, modified
![AG-PST in a protective dielectric case](http://pipe-st.com/images/bodyblock/img-3715-2-1.jpg)
AG-PST may be used:
AG-PST are environmentally friendly, low soluble and do not contaminate aqueous and process media with dissolution products.
AG-PST may be used as:
- surface anode groundings with vertical and horizontal position of electrodes;
- deep-water anode groundings located in casing columns;
- underwater anode groundings (for both: sea and fresh water).