Once a pipeline has been assembled and hydrotested, Zerust has a unique application that can protect pipelines from internal corrosion until the pipeline is commissioned. Zerust’s unique blend of Zerion Inhibitors is first mixed with water. In some cases, a vacuum truck may be used to mix the Zerust inhibitor with water.
The Zerust inhibitor slurry is then pumped into a pig launcher adjacent to the pipeline and is injected between a lead pig and a filming pig. Typically, compressed air is used to push the pigs through the pipeline. As the pigs move, the inhibitor slurry is misted, creating a thin film on the internal surfaces of the pipeline and the Soluble Corrosion Inhibitors, or SCI, is in direct contact with the entire metal surface of the pipe interior and will neutralize corrosive contaminants on the surface of the steel.
Vapor Corrosion Inhibitor (VCI) molecules are released that protect the bare metal surfaces. The inhibitor molecules fill the pipeline as well as any gaps due to valves, ports and instrumentation. Corrosion inhibitor particles remain even when the water evaporates, still releasing VCI molecules. In the event of any water ingress, the inhibitor will neutralize corrosive contaminants. SCI will neutralize the surface of the steel and pH balancing of the chemistry.
Long lengths of piggable pipelines can be protected using this method. The sealed pipe section will remain protected for several years.
Zerust has successfully implemented this solution on significant pipeline lengths.
Do you have a pipeline in the pre-construction or pre-commissioning stage for which you need anti-corrosion solutions?
Contact us today for your corrosion management needs.