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Preservation (corrosion prevention)

Preservation (corrosion prevention)

(OP)
Dear experts,

We have a lot of plates came from the mill steel in overseas.

During material inspection most of the plates have heavy rust or something like "chicken fox".

The client request us to do preservation.

We do not have a coating inspector in our organization.

I would be glad if you can share me the preservation procedure (sweep blast ? apply the primer coat?)


Syah
Syahar1975@yahoo.com

RE: Preservation (corrosion prevention)

Blasting and primer coat is one way, you can apply also for thin-layer preservation with Anticorit DFW or Tectyl for thick-layer preservation

Wolfgang

RE: Preservation (corrosion prevention)

if the plates have heavy rust on arrival, you are too late already. if possible you better have your supplier take adequate measures to prevent corrosion of the plates before arrival.

generally speaking there are two methods of preservation: applying a coating (primer) that can and may stay on the surface later on or a mineral oil based corrosion preventative that needs to be disposed off primarily to painting or coating later on. depending on the composition of the mineral oil based preventative it will work for only a few hours or days or longer up to several years. for that reason companies offer fluids that differ in viscosity, amount of anti corrosion additives and water repelling properties.

the first thing to do is to talk to your client to find out what type of rust prevention is preferred in view to what later needs to be done to the treated material. the second step is to find out whether your supplier can carry out the necessary treatment and if not, you will need to do it yourself. in that case you also need to remove all the rust that is already there, which can be quite costly and time-consuming.

if you decide to use a mineral oil based preventative you should speak to a knowledgeable supplier who should be capable to advise which grade in their portfolio would be the most suitable, given the protection requirements and the duration of the required protection.

RE: Preservation (corrosion prevention)

Linseed oil has been used as a rust preventive for hundreds of years. It is essential to wipe off all excess oil from the surface after application for it to cure properly. A properly applied coating is so thin and transparent as to be almost invisible. Iron catalyzes a reaction between the oil and air. The same reaction is used to season cast iron cooking skillets using vegetable oil. Turpentine can be used to thin the oil to make application easier.

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