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Corrosion Protection Of API 5L Steel By Cold Spray Zinc Alloy Coatings In Simulated Natural Gas Pipeline Environments

Product Number: 51321-16977-SG
Author: Lucas Teeter; Margaret Ziomek-Moroz; Joseph Tylczak; Grant Crawford
Publication Date: 2021
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Novel cold spray zinc-based alloy coatings have been investigated for corrosion protection of API 5L low
carbon steel pipelines used in transporting natural gas. These different zinc alloy coatings are designed
for use to help prevent internal corrosion and improve the lifespan of steel pipelines via sacrificial anodic
protection. The corrosion behavior of these cold deposited zinc alloy coatings was investigated in CO2
saturated 3.5 wt.% NaCl solutions under simulated natural gas pipeline conditions.
Electrochemical tests were conducted at 25 and 40 °C to determine the polarization resistance and
galvanic current between each coating and the steel substrate in the galvanic couple. Tests were
conducted at atmospheric, 1 bar, pressure. The results indicate that use of these coatings has the
potential to increase the lifespan of steel pipelines above what a zinc coating alone could provide.

Novel cold spray zinc-based alloy coatings have been investigated for corrosion protection of API 5L low
carbon steel pipelines used in transporting natural gas. These different zinc alloy coatings are designed
for use to help prevent internal corrosion and improve the lifespan of steel pipelines via sacrificial anodic
protection. The corrosion behavior of these cold deposited zinc alloy coatings was investigated in CO2
saturated 3.5 wt.% NaCl solutions under simulated natural gas pipeline conditions.
Electrochemical tests were conducted at 25 and 40 °C to determine the polarization resistance and
galvanic current between each coating and the steel substrate in the galvanic couple. Tests were
conducted at atmospheric, 1 bar, pressure. The results indicate that use of these coatings has the
potential to increase the lifespan of steel pipelines above what a zinc coating alone could provide.