Nano Phosphatic Hybrid Geopolymeric Coating for Steel
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Solution Overview
Problem
Conventional geopolymeric coating materials for mild steel lack simultaneous presence of inorganic-organic molecules, resulting in non-homogeneous matrices with poor adhesion and corrosion resistance, and often rely on commercially available compounds rather than naturally occurring organic inhibitors, which limits their techno-commercial application.
Innovation Solution
A nano phosphatic hybrid inorganic-organic geopolymeric coating material is developed through mechanico-chemical dry grinding of fly ash, sodium hydroxide, rice husk, tri calcium phosphate, and cetyl trimethyl ammonium bromide, with optional sodium silicate, to create a tailored precursor that reacts with water, forming a homogeneous matrix with improved adhesion and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional geopolymeric coating materials are used, then the coating can be applied to mild steel, but the coating exhibits poor adhesion and corrosion resistance due to non-homogeneous matrix lacking simultaneous presence of inorganic-organic molecules
Solution Approach 1:
The patent develops a hybrid geopolymeric coating material that combines inorganic components (fly ash, sodium silicate, tricalcium phosphate) with organic components (rice husk extract, cetyl trimethyl ammonium bromide) to create a composite material system. This composite approach enables the simultaneous presence of inorganic-organic molecules in the coating matrix, resolving the homogeneity issue while improving both adhesion and corrosion resistance properties
Solution Approach 2:
The patent modifies the chemical composition parameters of the geopolymeric coating by incorporating specific ratios of inorganic and organic components. The coating includes tricalcium phosphate (1-5 wt%), rice husk extract (2-5 wt%), and cetyl trimethyl ammonium bromide (0.5-2 wt%) alongside fly ash and sodium silicate. These parameter changes create a homogeneous matrix with improved corrosion resistance and adhesion
2Ease of manufacture
If commercially available compounds are used in coating materials, then the coating can be produced, but the techno-commercial application is limited due to absence of naturally occurring organic inhibitors
Solution Approach 1:
The patent utilizes naturally occurring organic inhibitors derived from rice husk extract instead of relying solely on commercially available compounds. The rice husk extract provides natural organic molecules that enhance corrosion inhibition, making the coating material more adaptable for techno-commercial applications while maintaining ease of manufacture through the use of readily available natural materials
3Reliability
If organic and inorganic coating materials are used separately, then each can provide specific properties, but the coating lacks the synergistic effect of combined inorganic-organic molecules for improved adhesion and corrosion resistance
Solution Approach 1:
The patent merges organic and inorganic coating materials into a single hybrid geopolymeric system. The coating integrates fly ash, sodium silicate, and tricalcium phosphate (inorganic components) with rice husk extract and cetyl trimethyl ammonium bromide (organic components) in a unified composition. This merging creates synergistic effects that improve adhesion and corrosion resistance while maintaining a manageable coating formulation
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 coating material exhibits enhanced corrosion resistance and adhesion properties, extending the lifespan of mild steel infrastructure by preventing surface deterioration due to corrosion, with anti-corrosive and heat-resistant properties.
Implementation Method 1
together mechanico-chemical dry grinding of raw materials fly ash, sodium hydroxide, rice husk, tricalcium phosphate and cetyl trimethyl ammonium bromide with and without sodium silicate in solid powder form
Implementation Method 2
The coating material is obtained by adding water alone to tailored nano phosphatic hybrid inorganic-organic precursor
Data Source
AI summary
The present invention provides a nano phosphatic hybrid geopolymeric corrosion resistant coating material. The tailored precursor of corrosion resistant coating material is obtained by a process involving, together dry grinding of raw materials fly ash, sodium hydroxide, rice husk, tri calcium phosphate and cetyl trimethyl ammonium bromide optionally with sodium silicate, in solid powder form. The developed coating material obtained by adding water to tailored precursor contains nano sized phosphatic compounds of Cancrisilite (sodium aluminum carbonate silicate hydrate), quartz, mullite, heamatite, sodium aluminum silicate, Herschelite (sodium aluminum silicate hydrate), Sucrose, α D-Glucose, Native cellulose, and phenol, responsible for providing improved corrosion resistant properties and adhesion to the mild steel substrates. The geo-polymeric coating material is used as an anti-corrosive, heat resistant coating material on various materials e.g. mild steel substrates.