Bis-Quaternized Corrosion Films for Wet Sour Metal Protection

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Solution Overview

Problem

Conventional corrosion-resistant films used in oil and gas facilities are often toxic, non-biodegradable, and ineffective in wet sour environments, leading to high maintenance costs and corrosion issues in pipelines and processing units.

Innovation Solution

Development of corrosion-resistant films and substrates utilizing bis-quaternized ammonium compounds, which form strong bonds with surfaces and provide enhanced corrosion resistance in wet sour environments, reducing production costs and toxicity compared to conventional compounds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional compounds are used in corrosion-resistant films, then corrosion resistance is provided, but the compounds are toxic and non-biodegradable

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidtoxicity

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical parameters of corrosion inhibitor compounds by using bis-quaternized ammonium compounds with specific molecular structures (containing two quaternary ammonium groups separated by alkylene chains) instead of conventional single quaternary ammonium compounds. This structural parameter change provides effective corrosion resistance while reducing toxicity and improving biodegradability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite corrosion inhibitor molecules that combine two quaternary ammonium functional groups with specific spacer chains (C2-C18 alkylene groups). This composite molecular structure creates synergistic effects where the dual functional groups enhance corrosion protection while the specific spacing and chain lengths optimize biodegradability and reduce toxicological concerns.

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional compounds are used in corrosion-resistant films, then corrosion protection is achieved, but production costs are high

Engineering Contradiction:

Improvecorrosion protectionVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent utilizes readily available and relatively inexpensive chemical precursors for synthesizing bis-quaternized ammonium compounds, including quaternary ammonium salts and dibromoalkanes. The synthesis process uses common solvents and standard chemical procedures, making the corrosion inhibitors more cost-effective than conventional alternatives while maintaining effective corrosion protection.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If conventional compounds are used in corrosion-resistant films, then some corrosion resistance is provided, but they do not sufficiently resist corrosive effects in wet sour environments

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidresistance in wet sour environment

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent optimizes molecular parameters of the corrosion inhibitor by incorporating two quaternary ammonium groups with specific spacing (C2-C18 alkylene chains). This structural configuration enhances the compound's ability to adsorb onto metal surfaces and form protective films that are particularly effective in wet sour environments containing H2S, CO2, and organic acids, overcoming the limitations of conventional single-group inhibitors.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The dual-functional group structure creates a composite molecular architecture that provides enhanced interaction with metal surfaces through multiple binding sites. This composite structure forms more robust and stable protective films in aggressive wet sour conditions compared to conventional single-functional compounds, improving adaptability to harsh oil and gas processing environments.

Inventive Principle:

Principle #40Composite materials

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 bis-quaternized ammonium-based films demonstrate improved corrosion resistance and bonding capabilities, effectively protecting metal surfaces in harsh environments while being less toxic and cost-effective.

Implementation Method 1

contacting and drying onto surfaces of substrates to create the corrosion-resistant substrates

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS12065582B2Corrosion inhibitor solutions and corrosion-resistant substrates that include bis-quaternized ammonium compounds and methods of making the same

Publication Date: 2024.08.20 SAUDI ARABIAN OIL CO

AI summary

According to embodiments disclosed herein, a corrosion-resistant substrate may comprise a substrate comprising a first surface and a corrosion-resistant film positioned on at least a portion of the first surface of the substrate. A method of producing a corrosion-resistant substrate may comprise contacting at least a portion of a first surface of a substrate with a corrosion inhibitor solution and drying the corrosion inhibitor solution to produce the corrosion-resistant film on the substrate, wherein at least a portion of the solvent may be expelled from the corrosion inhibitor solution during the drying to form the corrosion-resistant film, such that the corrosion-resistant film is solid. The corrosion inhibitor solution and the corrosion-resistant film may comprise a bis-quaternized ammonium compound.