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How can you choose materials for a corrosion-resistant heat exchanger?
To choose materials for a corrosion-resistant heat exchanger, you need to consider several factors such as the operating conditions, the corrosive environment, and the compatibility of the materials with the fluids being processed. Here is a step-by-step guide on how to choose materials for a corrosRead more
To choose materials for a corrosion-resistant heat exchanger, you need to consider several factors such as the operating conditions, the corrosive environment, and the compatibility of the materials with the fluids being processed. Here is a step-by-step guide on how to choose materials for a corrosion-resistant heat exchanger:
It is important to note that the selection of materials for a corrosion-resistant heat exchanger is a complex process that requires careful consideration of various factors. Consulting with experts and conducting thorough research is crucial to ensure the optimal material selection for your specific application.
Sources:
“Materials Selection for Corrosion Control” by Roger Francis, John P. Broomfield
“Corrosion Resistance Tables: Metals, Nonmetals, Coatings, Mortars, Plastics, Elastomers, and Linings and Fabrics” by Philip A. Schweitzer
See lessWhat is a workload thermocouple and what does it look like inside?
A thermocouple is a sensor that measures temperature. It consists of two different types of metals, joined together at one end. When the junction of the two metals is heated or cooled, a voltage is created that can be correlated back to the temperature. A thermocouple is a simple, robust and cost-efRead more
A thermocouple is a sensor that measures temperature. It consists of two different types of metals, joined together at one end. When the junction of the two metals is heated or cooled, a voltage is created that can be correlated back to the temperature. A thermocouple is a simple, robust and cost-effective temperature sensor used in a wide range of temperature measurement processes.
READ MORE: https://www.omega.com/en-us/resources/thermocouple-hub
See lessWhy must the cryogenic medium used to cool the cold trap between the gas manifold and the mechanical pump be liquid nitrogen?
Liquid nitrogen cold traps prevent products arising during the equipment operation from passing from the chamber into the pump where they could either contaminate the pump or cause the breakdown of the pump fluid. In either case, severe loss of efficiency and poor vacuum levels result. In the examplRead more
Liquid nitrogen cold traps prevent products arising during the equipment operation from passing from the chamber into the pump where they could either contaminate the pump or cause the breakdown of the pump fluid. In either case, severe loss of efficiency and poor vacuum levels result. In the example shown the diffusion pump was only capable of reaching 4 x 10-3 Torr rather than the typical 1 x 10-5 Torr range achieved with a clean pump. In addition, these types of cold traps prevent backstreaming of the pump.
SOURCE: Cold Traps / VAC AERO International Inc.
See lessWhat are some common vacuum furnace pumping system failures and their solutions?
For the many vacuum furnaces in use around the world, the vacuum pumping system is a critical component. To get the best value from the vacuum furnace system and to extend its useful life, the regular and careful maintenance of the various vacuum pumps is of utmost importance. Here are two resourceRead more
For the many vacuum furnaces in use around the world, the vacuum pumping system is a critical component. To get the best value from the vacuum furnace system and to extend its useful life, the regular and careful maintenance of the various vacuum pumps is of utmost importance.Â
Here are two resources that delve deeply into this question, courtesy of Solar Atmospheres and Bill Jone.
This PDF published by Solar Atmospheres Inc. and a Youtube Video presented by the legendary founder of Solar Atmospheres, Bill Jones
SOURCE: Solar Atmospheres Inc. https://solaratm.com/
See lessWhat are acceptable helium leak rates?
The leak-up rate you should be looking for depends primarily on the type of base metals you are trying to braze. As mentioned at the beginning of this article, any air leak into the furnace represents an influx of oxygen into the furnace. Metals vary considerably in their tolerance of oxygen, with nRead more
The leak-up rate you should be looking for depends primarily on the type of base metals you are trying to braze. As mentioned at the beginning of this article, any air leak into the furnace represents an influx of oxygen into the furnace. Metals vary considerably in their tolerance of oxygen, with nickel and gold being examples of metals that have a large tolerance for the presence of oxygen. That is, they will not oxidize to the point that there is any negative effect on brazing.
However, other metals, such as chromium, or base metals which contain titanium and/or aluminum in their chemistry, will be highly sensitive to the presence of any oxygen in the furnace. Thus, may I suggest the following as a guideline for vacuum-furnace brazing:
Tolerable Vacuum Furnace Leak-up Rates:
SOURCE: Kay & Assoc. Brazing Consultants
See less