Material Engineers

[angmartin]

Hello!
I am working on a project where my house is subjected to high temperatures and near the sea. How can metallic alloys be designed for greater resistance to high temperatures and wear?
Thank you

 

[zeusfaber]

Until you start to put numbers to terms like "high temperatures", nobody is really going to understand your problem. You probably want to explain a bit more about why you expect wear to be a problem as well.

A.

 

[zeusfaber]

Just a bit of speculation since you mention being close to the sea, but don't talk about the source of your wear: Are you actually worried about corrosion rather than wear? If so, "critical pitting temperature" might be a useful search term.

A.

 

[angmartin]

Hello! Thanks for the answer,

Due to exposure to the marine environment, corrosion is more important to me.

Marine air contains salt and other contaminants that can rapidly corrode metals. The corrosion process can weaken the structure and reduce its service life.

In summer temperatures can reach 32 degrees, I am not sure which metallic materials are better at withstanding corrosion.

Thank you.
A

 

[zeusfaber]

Coastal air at 32C isn't so challenging an environment that it needs to dominate your thinking to the exclusion of all else.

A sensible approach would be to look at what you need your material to do (requirements for electrical conductors being different to those for high pressure air pipes and both different from crane jibs) - then look at what materials might be available to meet those requirements, then eliminate the options that corrode under those conditions and pick one of the remaining materials based on things like cost, availability and ease of fabrication.

32C is well within the range of temperatures where less exotic alloys can have their corrosion resistance improved by a well-maintained coat of paint.

If you come to the conclusion that the answer is an austenitic stainless steel called SS316L, you wouldn't be the first - and you may have got there using a much easier (but less reliable) process - just copying everybody else.

A.

 

[IRstuff]

The corrosion process can weaken the structure and reduce its service life.

What is the "structure" and what is its intended life? 32C is hardly "high temperature" given that MIL-HDBK-310 has a maximum temperature of 49C and the historical maximum temperature is around 54C.

Ships are made from metals as are numerous objects near the ocean, like railings, bridges, etc.

You need to describe the application and its requirements, since that is the way to design things, not to randomly poke at the bear.

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[rb1957]

are there similar metal structures near where you are ?

I'd talk to companies that do coatings and paint for corrosion protection ... see what they recommend.

I expect your choices will be ...
1) an expensive premium steel that probably won't corrode (CRES),
2) a mid-range product (treated steel) that will have a life ... ie it'll corrode but slowly and maybe not significantly if the protection is reapplied periodically), or
3) a cheap product that may last the life of your project (whatever that is).

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.