Acid-Curable Resin Pipe Coating for Corrosion Resistance
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Solution Overview
Problem
The existing coating methods for preventing corrosion in oil and gas pipelines are ineffective in the long term, requiring frequent maintenance and resulting in productivity losses and environmental hazards due to the limited durability of the corrosion prevention film.
Innovation Solution
A coating material comprising an acid curing agent and an acid curable resin, such as furan or phenol resin, is applied to the inner pipe surface, where the acid curable resin is adhered and then cured by an acid curing agent, forming a durable protective layer that extends the corrosion prevention period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a corrosion prevention agent is coated onto the inner wall of the pipe to form a coating film, then the corrosion prevention effect is provided, but the coating film deteriorates over time requiring frequent maintenance
Solution Approach 1:
The invention changes the chemical composition and structure of the coating material by incorporating specific resins (epoxy, phenolic, polyurethane, vinyl, or polyester resin) with controlled molecular weight and functional group content. This parameter optimization enables the coating to achieve both immediate corrosion protection and long-term durability, extending service life from months to years while maintaining reliable corrosion prevention
Solution Approach 2:
The invention uses composite coating materials formed by combining resin components with specific molecular weight ranges and functional group densities. This composite structure creates a coating film that integrates multiple protective functions: adhesion to pipe surface, corrosion resistance, and durability, thereby extending the service life while maintaining reliable protection
2Reliability
If maintenance such as recoating is performed to restore corrosion prevention effect, then the corrosion prevention effect is restored, but productivity is decreased due to production stoppage
Solution Approach 1:
The invention applies a high-performance coating material with extended service life before production begins, creating a durable protective layer that prevents corrosion for an extended period. This preliminary action with optimized longevity reduces the frequency of maintenance interventions, thereby minimizing production stoppages and maintaining higher overall productivity
Solution Approach 2:
By optimizing the chemical parameters of the coating material (resin type, molecular weight, functional group content), the invention extends the service life of the coating film, reducing maintenance frequency and associated production losses
3Reliability
If corrosion prevention agent is continuously added to mined oil to reduce pipe corrosion, then corrosion is reduced, but the procedure becomes very expensive
Solution Approach 1:
The invention applies a durable coating material to the pipe inner wall before oil transport begins, creating a long-lasting protective barrier. This preliminary protective action eliminates or reduces the need for continuous addition of corrosion prevention agents to the oil, significantly reducing the quantity of chemical substances required and lowering overall corrosion prevention costs
Solution Approach 2:
The composite coating material provides sustained corrosion protection, reducing dependency on continuous chemical addition and associated costs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides long-term corrosion resistance, reducing maintenance frequency and enhancing productivity by effectively blocking corrosive gases and preventing pipe corrosion for an extended period.
Implementation Method 1
the acid curable resin is passed through the pipe to adhere the acid curable resin to the at least a part of the inner wall of the pipe
Implementation Method 2
the acid curing agent is passed through the pipe to allow the acid curing agent to make contact with the adhered acid curable resin so that the acid curable resin is cured
Data Source
AI summary
In the coating method, a pipe for transporting oil and/or gas mined from underground is provided. An acid curable resin is passed through the pipe to adhere the acid curable resin to at least a part of an inner wall of the pipe. Then, an acid curing agent is passed through the pipe to allow the acid curing agent to make contact with the acid curable resin such that the acid curable resin is cured.