There are many methods adopted for the manufacture of alloys consisting of more than one metal in order to protect the metal from corrosion.
The correlation between manufacturing process and corrosion performance of a product could be very complicated. One should consider the factors affecting corrosion to understand how to design a manufacturing process that could serve corrosion performance of the product. First, the alloy should be designed in a way that not only supports the desired corrosion performance but also supports the other requirement of the final product, e.g. mechanical properties, thermal properties, toxicity and etc. Then the manufacturing process should be designed in order to maintain all of the required properties including corrosion resistance. Manufacturing processes can alter materials' properties by changing their structure. If the manufacturing process that is designed to produce the product does not maintain all of the required properties, one could employ supplementary manufacturing processes to improve the corrosion performance of the product.
At this point, this is all I can say. But, if you could be more specific, I might be able to help. Please feel free to correct me if I misunderstood you, we could discuss about this topic.
Dear Nada
You can use any method to manufacturing the alloys such as casting or powder metallurgy and then you can achieve the corrosion test. Please, find attachments.
Best Regards
You can use the preparation method for specimens|( which can be manufactured in any manufacturing processes may be casting,forging ,powder technolgy,rolling extrusion,drawing......etc).
The preparation method consist of:cutting then grinding then polishing for specimens to corrosion tests.
Dear Nada,
Alloying can increase or reduce the strength, hardness, electrical and thermal conductivity, corrosion resistance, or change the color of a metal. ... this page describes the effects of various alloying elements on copper and copper alloys such as brass and bronze. basic purpose to make corrosion resistant alloying is to improved strength and corrosion resistance, durability and damage tolerance, and to make low density. Trends in processing are forming, near-net-shape forging and casting processes, forging process, casting, high speed machining of low-residual-stress parts, superplastic forming and diffusion bonding
There are so many routes for manufacturing process of alloys can fight against corrosion such as casting, forging, extrusion, drawing,rolling, powder metallurgy(green and compact sistering both, hydride dehydride process, ), electrolysis, mechanical alloying, advance methods such as atomization, gas atomization and plasma atomization, future methods such as cold spray, additive manufacturing( future methods such as 3d printing, electron beam melting, selective laser melting etc. ).
Specially corrosion resistant alloys that are advance technology is better suited to the requirements needed i the area of exploration and production. cr, ni and mo are the best alloying elements are added in composition according to manufacturing specifications to have a high strength and resist corrosion of different forms. nickel, monels, hastealloy, tliums and tnconels are some great examples. Welding corrosion resistant alloys are also steels and stainless steels etc.
Best way to make corrosion resistant is casting, forging and forming. However, defects might be there but desired corrosion resistant properties could be achieved by the casting methods. All products can go through the melt/remelt, and hot rolling process for sheet and plate are considered best to achieve the desired strength and corrosion properties. Powder metallurgy and other advance routes could be followed and less defects might be there, but certainty to achieve desired product does not grant except the casting and forging routs of alloying. This is my opinion.
Hope it work out for you.
Ashish
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