windows frame

Vinyl clad?

billybolbol,

As guest suggested, vinyl (polyvinylchloride). It is fairly resistant to attack by chlorine gas, but any exposed metal anywhere will be in trouble.

--JMM

Dear Billy

why cant you use the windows made out of wooden or concrete ?

thanks

wasantha.

It sounds as though there is a containment problem with the chlorine that is well overdue for fixing.....

In my experience, it is very hard to keep chlorine from escaping into the environment. Therefore, design includes mitigating the harm it can cause to the structure and ensuring safety for those who work there. Even an occasional leak of chlorine, particularly in a humid environment, invites manor problems with corrosion.

--JMM

In all of the chlorine sheds I have had experience with, the window frames were all wood. If hardwood is used, mill a slot into it the same size as the glass and fit it into the slot. The best sealing medium is pitchblende or tar, as it is impervious to gaseous chlorine. I know this is rather "old hat" and low tech, but sometimes the 'old' methods are still the most reliable (and cheapest). By the way, use of a pvc paint or PVA can also help as either product is also unaffected by chlorine gas.

Regards,

Pete.

What about Galvanized stainless steel,

or wrought iron coated

What's the point of galvanising stainless steel? In my experience stainless steel is not good around gaseous chlorine, but wrought iron is. Wrought Iron windows are a definite possibility, coated with a suitable antirust coating. Chlorine is a powerful oxidant, but in the case of wrought iron and chlorine only exposure it forms a hard oxide barrier and does not corrode further. However when exposed to moisture and air as well as chlorine, rusting can be accelerated, hence the need for good antirust coatings. Bare metals should be avoided for the same reasons, and I haven't seen much evidence that zinc, or galvanising, offers any better protection than any other. I would still go for the cheapest alternative - wood.

Cheers,

Pete.

thanks for your reply,

your answer is very useful, i rated as a good answer

but i wonder if i can use mild steel as wrought iron not really available currently,

also do u think i still need to galvanize it or coated by any how?

wood wont work for me as it is a high humid environment

thank you

thanks for every body here

Using mild steel should be OK. It works much the same as wrought iron, although you will definitely need to coat it with a coating that will not allow air penetration. I would suggest pvc or a two pack epoxy of some kind. So long as air cannot reach the MS it should be fine. Galvanising isn't recommended as chlorine will attack the zinc, unless it too is painted or coated. Coatings don't normally stick to galvanising as well as to MS so it probably isn't worth the extra effort. Powder coating of the MS can also work, so long as the thickness of the coating is greater than 80microns or less than 200microns. (Too thick coating introduces differential temperature cracking betwwen sides after exposure to weather and premature failure, unless the coating is very flexible)

Regards,

Pete.

Aluminum Titanium Alloy will work good