Compound inhibitors for restricting carbon steel corrosion in methanol solution and application thereof
A methanol solution and corrosion inhibitor technology is applied in the field of composite corrosion inhibitors to achieve the effect of high corrosion inhibition rate, reduced corrosion rate, and corrosion solution.
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Embodiment 1
[0031] Prepare 100g of organic compound corrosion inhibitor.
[0032] Take by weighing 4.0 g of hydroxyphosphonoacetic acid with an active substance content of 50%, dissolve it in 50.0 g of water; take by weighing 8.8 g of zinc sulfate heptahydrate and add it to the solution, and add 2.0 g of 1:3 sulfuric acid to make sulfuric acid heptahydrate Zinc is fully dissolved; add 35.2g of water to the above solution and stir evenly to obtain the required 100g of corrosion inhibitor.
[0033] When the prepared corrosion inhibitor is added to the methanol solution at a concentration of 100mg / L, calculated based on the amount of water in the methanol solution, hydroxyphosphonoacetic acid (calculated as active substance content) and zinc sulfate heptahydrate (calculated as Zn 2+ The effective concentrations are 2mg / L and 2mg / L respectively.
Embodiment 2
[0035] Prepare 100g of organic compound corrosion inhibitor.
[0036] Take by weighing 8.0 g of hydroxyphosphonoacetic acid with an active matter content of 50%, dissolve it in 50.0 g of water; take by weighing 8.8 g of zinc sulfate heptahydrate and add it to the above solution, and add 2.0 g of 1:3 sulfuric acid to make sulfuric acid heptahydrate Zinc is fully dissolved; add 31.2g of water to the above solution and stir evenly to obtain the required 100g of corrosion inhibitor.
[0037] When the prepared corrosion inhibitor is added to the methanol solution at a concentration of 100mg / L, calculated based on the amount of water in the methanol solution, hydroxyphosphonoacetic acid (calculated as active substance content) and zinc sulfate heptahydrate (calculated as Zn 2+ The effective concentrations are 4mg / L and 2mg / L respectively.
Embodiment 3
[0039] Prepare 100g of organic compound corrosion inhibitor.
[0040] Take by weighing 8.0 g of hydroxyphosphonoacetic acid with an active matter content of 50%, dissolve it in 40.0 g of water; take by weighing 17.7 g of zinc sulfate heptahydrate and add it to the above solution, and add 2.0 g of 1:3 sulfuric acid to make sulfuric acid heptahydrate Zinc is fully dissolved; add 32.3g of water to the above solution and stir evenly to obtain the required 100g of corrosion inhibitor.
[0041]When the prepared corrosion inhibitor is added to the methanol solution at a concentration of 100mg / L, calculated based on the amount of water in the methanol solution, hydroxyphosphonoacetic acid (calculated as active substance content) and zinc sulfate heptahydrate (calculated as Zn 2+ The effective concentrations are 4mg / L and 4mg / L respectively.
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