Insulation Material With Integrated Air Gaps for CUI Drainage
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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 corrosion issues that are not easily detectable until insulation is removed or metal failure occurs, and existing spacer systems do not provide optimal protection.
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 away from the steel surface, which is achieved by affixing or integrating protrusions with an abutting surface height of at least 2 mm onto the insulation material substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If insulation material is placed directly against the steel component surface, then thermal insulation effectiveness is improved, but water can be trapped between the insulation and steel surface causing corrosion under insulation
Solution Approach 1:
The insulation material is segmented with protrusions that create discrete air gaps between the insulation and the steel surface. This segmentation allows water to drain away from the metal surface while maintaining thermal insulation contact in other areas, thus preventing CUI while preserving thermal effectiveness.
Solution Approach 2:
The protrusions act as an intermediary structure between the insulation material and the steel surface. They create a physical barrier that prevents direct water contact with the metal while allowing the insulation to maintain thermal contact, thus mediating between the conflicting requirements of thermal efficiency and corrosion prevention.
2Object-affected harmful factors
If spacer systems are used to create air gaps between insulation and steel surface, then corrosion protection is improved, but the system complexity and assembly difficulty increase
Solution Approach 1:
The spacer function is merged directly into the insulation material by integrating protrusions during manufacturing. This eliminates the need for separate spacer components and their associated assembly steps, thus providing corrosion protection while reducing system complexity and ease of installation.
Solution Approach 2:
The insulation material provides its own corrosion protection function through integrated protrusions that automatically create drainage paths. The structure is self-sufficient and does not require additional components or complex assembly procedures, thus simplifying the overall system while maintaining effective corrosion protection.
3Object-affected harmful factors
If protrusions with height of at least 2 mm are integrated into insulation material, then water drainage capability is improved, but manufacturing complexity increases
Solution Approach 1:
The protrusion height parameter is optimized to at least 2 mm, which is the minimum dimension required to create effective drainage paths while minimizing material usage and manufacturing complexity. This parameter change balances drainage effectiveness with ease of manufacturing.
Solution Approach 2:
The protrusions can be made from the same material as the insulation substrate or from different materials with complementary properties. This composite approach allows optimization of each component for its specific function while maintaining manufacturability through integrated production processes.
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 effectively reduces corrosion by creating a drainage path for moisture away from the corroding surface, minimizing contact and thus reducing corrosion damage to equipment, and is designed to be easily integrated into existing insulation systems.
Implementation Method 1
allowing water to drain away from the steel surface
Implementation Method 2
insulation material... to provide insulation to the component, such as thermal insulation
Data Source
Figure 1~2
Figure 3~4c
Figure 5~6
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.