Insulation Material With Integrated Air-Gap Protrusions for CUI
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Solution Overview
Problem
Corrosion under insulation (CUI) occurs in steel components due to trapped water between insulation materials and steel surfaces, leading to hidden corrosion damage that can cause equipment failures.
Innovation Solution
An insulation material with integrated protrusions that create an air gap of at least 2 mm between the insulation and the corroding surface, allowing water to drain and reducing contact, comprising a substrate with protrusions affixed or integral to the surface, each protrusion having an abutting surface height of at least 2 mm to ensure effective moisture removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulation material directly abuts the steel component surface, then thermal insulation efficiency is improved, but water trapping occurs leading to corrosion under insulation
Solution Approach 1:
The patent introduces an intermediary air gap between the insulation material and the steel component surface. This air gap acts as a mediator that prevents direct contact between water/condensate and the metal surface, allowing water to drain away while maintaining thermal insulation performance. The spacer system creates this intermediate space that resolves the contradiction between insulation contact and corrosion prevention.
Solution Approach 2:
The insulation material surface is segmented with protrusions that create multiple localized air gaps around the steel component. Instead of a single continuous contact surface, the protrusions divide the interface into multiple segments, allowing water to be channeled away in multiple drainage paths rather than pooling in a single area, thus preventing corrosion while maintaining insulation effectiveness.
2Reliability
If spacer systems are used to create air gaps, then corrosion protection is improved, but assembly complexity increases
Solution Approach 1:
The patent merges the spacer function directly into the insulation material by integrating protrusions into the insulation substrate. This combination eliminates the need for separate spacer components and their associated assembly steps (clipping, positioning, securing). The air gap creation function is now inherent to the insulation material itself, reducing assembly complexity while maintaining corrosion protection benefits.
Solution Approach 2:
The insulation material with integrated protrusions performs multiple functions simultaneously: thermal insulation, corrosion protection through air gap creation, and water drainage facilitation. This multi-functional design eliminates the need for separate dedicated spacer systems, simplifying the overall assembly while achieving comprehensive protection against corrosion under insulation.
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 integrated protrusions effectively prevent moisture accumulation, reducing corrosion risk by maintaining an air gap and minimizing contact between the insulation and the corroding surface, thereby protecting steel components from CUI.
Implementation Method 1
the protrusion extending from the insulation material surface by at least 2 mm... an air gap is provided between the pipe and the insulation material
Data Source
AI summary
An insulation material comprising an insulation material substrate with a substrate surface, the insulation material further having a plurality of protrusions affixed to or integrated into substrate surface, each protrusion having an abutting surface distal to a protrusion base and a protrusion body connecting the abutting surface and the protrusion base, and each protrusion having an abutting surface height of at least 2 mm, wherein the abutting surface height is the shortest distance between the plane of the abutting surface and the plane of the protrusion base.