Anticorrosive Composition for Corrosion Under Insulation Protection

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Solution Overview

Problem

Existing anticorrosive compositions are ineffective, costly, difficult to handle, and harmful to humans and the environment, and they fail to adequately address corrosion under insulation (CUI) in steel structures, particularly in the oil and gas industry.

Innovation Solution

A composition comprising alkali metal silicates, alkali metal phosphates, and carboxylic acids or their salts, which are inexpensive, easy to handle, and environmentally friendly, is used to impart anticorrosive properties to materials like mineral wool products.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional protective coating layers (zinc or aluminum) are applied to steel structures, then corrosion protection is improved, but cost increases significantly and the solution becomes economically unacceptable for extensive pipeline systems

Engineering Contradiction:

Improvecorrosion protectionVSAvoidcost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces expensive long-term protective coatings with a cheaper, easily reapplicable composition. The composition can be applied periodically at low cost, effectively replacing the need for expensive metallic coatings while maintaining adequate protection through regular maintenance applications.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the chemical composition parameters by using a specific formulation with carboxylic acids (6-22 carbon atoms), alkali metal silicates, and alkali metal phosphates in controlled ratios. This parameter optimization achieves effective corrosion inhibition at lower material and application costs compared to traditional metallic coatings.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If existing anticorrosive compositions are used, then some corrosion protection is achieved, but they are harmful to humans and the environment

Engineering Contradiction:

Improvecorrosion protectionVSAvoidenvironmental harm

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent uses naturally occurring substances (carboxylic acids, silicates, phosphates) that are environmentally benign. These substances form protective films that inhibit corrosion without introducing harmful chemicals, effectively converting the need for chemical protection into a benefit of using eco-friendly materials.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The composition acts as an intermediary between the steel structure and the corrosive environment. The carboxylic acids, silicates, and phosphates form a protective barrier that prevents direct contact between corrosive agents and the metal, while the intermediary substances themselves are non-harmful to humans and the environment.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If existing anticorrosive compositions are used, then some corrosion inhibition is achieved, but they are difficult to handle

Engineering Contradiction:

Improvecorrosion inhibitionVSAvoidhandling

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent optimizes the physical parameters of the composition by controlling the molecular weight and structure of carboxylic acids (6-22 carbon atoms) and the ratios of components. This results in a composition with suitable viscosity and application properties that is easy to handle, spray, or brush onto steel surfaces without requiring special equipment or procedures.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If existing anticorrosive compositions are used, then some corrosion protection is provided, but they lack effectiveness in preventing corrosion under insulation

Engineering Contradiction:

Improvecorrosion protectionVSAvoideffectiveness

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent provides localized protection where it is most needed - under the insulation layer. The composition is applied directly to the steel surface before insulation installation, creating a targeted protective film at the corrosion-prone interface between steel and insulation, rather than providing uniform protection everywhere.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses a composite formulation combining carboxylic acids, alkali metal silicates, and alkali metal phosphates. This composite composition provides synergistic corrosion protection, where the combination of substances creates enhanced protection effectiveness compared to individual components, specifically addressing CUI conditions.

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 composition significantly reduces corrosion rates, providing effective protection against CUI with minimal environmental impact and lower costs, enhancing the durability of steel structures.

Implementation Method 1

The present invention relates to an anticorrosive composition and the use of such a composition for imparting anticorrosive properties to a material

Methodology Applied

Scientific EffectCorrosion inhibition:

Data Source

PatentUS20260028284A1Anticorrosive composition

Publication Date: 2026.01.29 ROCKWOOL AS

AI summary

The present invention relates to an anticorrosive composition and the use of such a composition for imparting anticorrosive properties to a material, and a material comprising such a composition.