rscosta1976
Materials
- Feb 29, 2016
- 35
Dear members,
I found some references in a standard were it is recommended to coat the last 25-50 mm of the tips of the grid. One internal client asked if this is typical for electrostatic grids and asked what are the exact coating requirements for the grids. Unfortunately, I have no answer. Also I found very hard to find references regarding desalters electrostatic grid design details on the internet, because I believe this is a proprietary technology of a few companies.
I have good understanding of desalters vessels corrosion issues from my previous working experience, but the electrostatic grids were out of my scope of work. I just know the very basics: the grids are used to create an electric field to help coalesce and separate the water from oil/water emulsion and that several types of different grids and electrodes exist.
From my limited knowledge of these devices, I would say these components are usually not subjected to high corrosion, since they are in contact with oil/water emulsion and not free water, but I don't know if my feeling is correct. I guess I never gave much thought to it before. I would appreciate if you can let me know your experience regarding specific corrosion issues, usual material of construction and if coating is usually required or recommended for these internal components.
Thank you for your help.
Kind regards,
I found some references in a standard were it is recommended to coat the last 25-50 mm of the tips of the grid. One internal client asked if this is typical for electrostatic grids and asked what are the exact coating requirements for the grids. Unfortunately, I have no answer. Also I found very hard to find references regarding desalters electrostatic grid design details on the internet, because I believe this is a proprietary technology of a few companies.
I have good understanding of desalters vessels corrosion issues from my previous working experience, but the electrostatic grids were out of my scope of work. I just know the very basics: the grids are used to create an electric field to help coalesce and separate the water from oil/water emulsion and that several types of different grids and electrodes exist.
From my limited knowledge of these devices, I would say these components are usually not subjected to high corrosion, since they are in contact with oil/water emulsion and not free water, but I don't know if my feeling is correct. I guess I never gave much thought to it before. I would appreciate if you can let me know your experience regarding specific corrosion issues, usual material of construction and if coating is usually required or recommended for these internal components.
Thank you for your help.
Kind regards,