Polyester Polyamine Corrosion Inhibitors for Metal Surfaces
Solution Overview
Problem
Current corrosion inhibitors for metal surfaces in oil and gas fields lack effective environmental properties, such as biodegradability and low bioaccumulation, while also requiring improved technical performance, especially in stringent regulatory environments.
Innovation Solution
The development of polyesteramine or polyester polyquaternary ammonium compounds through the condensation of fatty acids, dicarboxylic acids, and alkanolamines, with optional quaternization, which are used as corrosion inhibitors for metal surfaces, providing a method to protect metal surfaces from corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional nitrogen-containing compounds (fatty amines, alkoxylated fatty amines, amidoamines, quarternary ammonium compounds) are used as corrosion inhibitors, then corrosion protection is achieved, but environmental properties (biodegradability, low bioaccumulation) are insufficient
Solution Approach 1:
The patent changes the chemical structure parameters by using polyester polyamines and polyester polyquaternary ammonium compounds with specific molecular weights (100-10,000 g/mol) and degrees of polymerization (1-50), which fundamentally alters the environmental properties while maintaining corrosion inhibition effectiveness
Solution Approach 2:
The invention creates composite molecular structures by combining polyester chains with amine or quaternary ammonium groups, resulting in compounds that integrate both the corrosion protection functionality and improved environmental characteristics through their unique polymeric architecture
2Reliability
If existing corrosion inhibitors are used in stringent regulatory environments, then corrosion protection is provided, but regulatory compliance regarding environmental properties is insufficient
Solution Approach 1:
The patent adjusts key parameters including molecular weight (100-10,000 g/mol), degree of polymerization (1-50), and chemical structure to ensure compliance with stringent environmental regulations while preserving corrosion inhibition performance
Solution Approach 2:
The polyester polyamine and polyquaternary ammonium compounds are designed to be biodegradable and environmentally friendly, allowing them to decompose naturally in the environment rather than persisting as harmful substances, thus meeting regulatory requirements for environmental safety
3Object-affected harmful factors
If new polyester polyamine/polyquaternary ammonium compounds are developed to improve environmental properties, then biodegradability and low bioaccumulation are achieved, but technical performance (corrosion inhibition efficacy) must be validated
Solution Approach 1:
The invention develops composite molecular structures combining polyester backbones with nitrogen-containing functional groups, where the polyester framework provides structural stability and the amine/quaternary ammonium groups provide corrosion inhibition activity, achieving both environmental and technical performance goals
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
These compounds demonstrate high efficacy in corrosion inhibition, excellent environmental properties, and are effective in a wide range of salt concentrations, offering protection for metal surfaces in harsh environments while meeting regulatory requirements for biodegradability and bioaccumulation.
Implementation Method 1
Different types of nitrogen-containing compounds, such as e.g. fatty amines, alkoxylated fatty amines, amidoamines, and quarternary ammonium compounds, are well-known bases for corrosion inhibitor formulations
Data Source
AI summary
The present invention relates to the use of a polyesteramine or a polyester polyquaternary ammonium compound as a corrosion inhibitor for metal surfaces, and to a method for protecting a metal surface from corrosion by contacting the metal surface with said corrosion inhibitor.