Thermally Sprayed Aluminium
Thermally Sprayed Aluminium
(OP)
We are being required by our customer to finish 316 stainless steel parts by thermally sprayed aluminium, with two epoxy coats on top of that in two different colours. I have found a vendor who will do it. I want to know how tough this finish is. I expect to be bolting the stainless steel parts together. The complete unit will be around 300kg, and we expect to be using an engine hoist to get it on and off carts and tables. Will the finish survive this?
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JHG
RE: Thermally Sprayed Aluminium
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RE: Thermally Sprayed Aluminium
RE: Thermally Sprayed Aluminium
The whole point of the epoxy being two different colours is that we can see damage to the finish. Is it really that delicate?
This does not sound easy to touch up.
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JHG
RE: Thermally Sprayed Aluminium
Never heard of that being tried before.
RE: Thermally Sprayed Aluminium
We think our customer knows what they are doing and we have found a vendor that does it. The aluminium coating makes sense as a sacrificial coating, since aluminium and stainless steel are at opposite ends of the galvanic scale. This is all assuming we deliver the system with the coating intact.
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JHG
RE: Thermally Sprayed Aluminium
RE: Thermally Sprayed Aluminium
1. 1st coat : Sealer- to seal the pores
2. Top coat : for finishing purpose
Please keep in mind that even though the external coating to TSA is damaged, the pores will be still filled with the sealer (1st coat) if the damage is not so severe. So only a minor touch up on the top coat to be expected always.
In my opinion, I give importance to sealer more than top coat. By seeing this coating requirement on SS, I perceive that the customer concerned about corrosion protection (ESCC). Technically I think sealer will do it.
RE: Thermally Sprayed Aluminium
T A Sumon et al, Corrosion Engineering, Science & Technology, Vol 48, (7), 2013 pp 552 - 557
for example.
Steve Jones
Corrosion Management Consultant
http://www.linkedin.com/pub/8/83b/b04
All answers are personal opinions only and are in no way connected with any employer.
RE: Thermally Sprayed Aluminium