Multi-Cone Anchor Coating for Smooth Release From Chemical Mortar
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Solution Overview
Problem
Cold-worked multi-cone anchoring elements face issues with scale formation and surface roughness during hot-dip galvanization, leading to increased frictional resistance and reduced detachment from chemical mortar, which compromises their functionality in chemical fastening technology.
Innovation Solution
A method involving electrogalvanization of the cold-worked multi-cone anchoring element, followed by the application of a protective coating, a primer, and a final coating with good separating and sliding properties, ensuring improved detachment and sliding characteristics while enhancing corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot-dip galvanization is used on cold-worked multi-cone anchoring elements, then corrosion protection is improved, but surface roughness and scale formation increase leading to increased frictional resistance
Solution Approach 1:
The coating system is divided into multiple functional layers: electrogalvanized zinc layer (corrosion protection), protective coating (sealing), primer (adhesion), and final coating (sliding properties). Each layer addresses specific requirements without compromising others.
Solution Approach 2:
The solution uses a composite coating structure combining metallic zinc layer with organic protective coatings. This multi-material approach allows simultaneous achievement of corrosion protection, smooth surface, and sliding properties that single materials cannot provide.
2Ease of manufacture
If cold-working is used to manufacture multi-cone anchoring elements, then manufacturing costs are lowered and surface smoothness is improved, but microscopic surface flaws are created that lead to scale formation during hot-dip galvanization
Solution Approach 1:
The electrogalvanization step is performed as a preliminary treatment before applying the protective coating system. This preliminary zinc layer seals the microscopic surface flaws created by cold-working, preventing scale formation during subsequent heating processes.
Solution Approach 2:
The electrogalvanized zinc layer acts as an intermediary between the cold-worked steel surface and the final protective coating. It masks the microscopic surface flaws and provides a uniform base for subsequent coating applications.
3Reliability
If a protective coating is applied directly on the electrogalvanized layer, then corrosion resistance is improved, but the final coating is completely absorbed by the protective coating losing separating and sliding properties
Solution Approach 1:
The coating system is segmented into distinct functional layers with a primer in between the protective coating and final coating. This segmentation prevents absorption and maintains the functional properties of each layer.
Solution Approach 2:
The primer acts as an intermediary layer between the protective coating and final coating, preventing the final coating from being absorbed by the protective coating while maintaining adhesion and sliding properties.
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 method effectively addresses the surface roughness issue, enhancing the anchoring element's ability to detach from chemical mortar and slide smoothly, thereby increasing load-bearing capacity and maintaining improved corrosion protection.
Implementation Method 1
electrogalvanization of the cold-worked multi-cone anchoring element
Data Source
AI summary
A cold-worked multi-cone anchoring element for chemical fastening technology is coated. The anchoring element detaches better from an injection mortar and exhibits both improved sliding properties and increased corrosion protection.