IMS Tool Assembly for Carbon Steel Pipe Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing injection-molded solder (IMS) techniques cannot effectively apply pure Cr, Mo, Ni, or Ti layers on the surface of carbon steel pipes due to the higher melting temperatures of these metals, which limits the creation of corrosion-resistant and high-strength surface coatings.
Innovation Solution
An IMS tool assembly that uses a tungsten head with a molten alloy reservoir and a pressure applicator to dispense a molten coating of Cr, Mo, Ni, or Ti onto the inner or outer surface of a carbon steel pipe, accompanied by cooling water to prevent the carbon steel from melting, allowing for a thin, controlled coating application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pure Cr, Mo, Ni, or Ti layers are applied on the surface of carbon steel pipes using conventional IMS techniques, then corrosion resistance and high strength properties are improved, but the process cannot be implemented because the melting temperature of these metals is higher than that of carbon steel
Solution Approach 1:
The patent uses a eutectic alloy as an intermediary material that has a lower melting temperature than both the coating metal (Cr, Mo, Ni, or Ti) and the carbon steel substrate. This eutectic alloy enables the coating process to proceed at temperatures below the melting point of the carbon steel while still allowing the coating metal to be applied effectively
Solution Approach 2:
The patent changes the temperature parameter by using a eutectic alloy composition that melts at a lower temperature than the carbon steel substrate. This parameter change allows the coating process to occur at temperatures where the carbon steel remains solid while the coating material can be applied and bonded to the surface
2Reliability
If bulk alloying metal is added to carbon steel to enhance corrosion resistance, then the chromium content protects the steel throughout its thickness, but the cost increases significantly
Solution Approach 1:
The patent applies corrosion-resistant coating metals (Cr, Mo, Ni, or Ti) only to the surface layer of the carbon steel pipe rather than mixing them throughout the bulk material. This local application provides the necessary corrosion protection at the surface while keeping the overall chromium content and material costs significantly lower
3Ease of manufacture
If conventional IMS techniques are used to coat pipe surfaces, then the process is simple, but it cannot create coatings of pure Cr, Mo, Ni, Nb, or Ti layers because the melting temperature of the pure metals is higher than that of carbon steel
Solution Approach 1:
The eutectic alloy serves as a mediator that enables the use of coating materials (pure Cr, Mo, Ni, Nb, or Ti) with higher melting temperatures than carbon steel. The intermediary alloy allows these materials to be applied via IMS technique without requiring the substrate to be melted
Solution Approach 2:
By changing the temperature parameter through the use of a eutectic alloy with lower melting point, the process expands the range of applicable coating materials to include pure metals with higher melting temperatures than the carbon steel substrate
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
Enables the efficient application of high-strength, corrosion-resistant coatings on carbon steel pipes, reducing the need for expensive stainless steel and lowering production costs by using carbon steel with targeted surface enhancements.
Implementation Method 1
accompanied by cooling water to prevent the carbon steel from melting
Implementation Method 2
dispense a molten coating of Cr, Mo, Ni, or Ti onto the inner or outer surface of a carbon steel pipe
Data Source
AI summary
An injection-molded solder (IMS) tool assembly apparatus, the apparatus including an IMS tool for dispensing a molten material via a round extrusion part to coat an inside or an outside wall of a pipe (and a chiller for providing cooling water to flow through an inside of the pipe.)