Flag MDF Primer

[Baldhead]

Does anyone use Flag MDF Primer (sold by Toolstation), I had to prime some MDF yesterday, I stirred it well as the instructions say, as I was painting I got in a right old mess, paint everywhere, then I noticed the base had several pin holes in it, there were no signs of any paint leaking before I stirred it so it would seem the inside of the tin has corroded. I've never come across this problem before with any type of paint, some of which has been stored for several years.

Has anyone had the same or similar problems? Is MDF primer corrosive?

TIA

Baldhead

Edit: the tin was nearly full although it was purchased in February 2012.

 

[ColeyS1]

I once heard a very similar story regarding a tin corroding -
Husband and wife, the wife worked long unsociable hours so when getting home would request that hubby trys to keep the noise down so she can rest. The only toilet in the house is upstairs next to the bedroom..... can you guess where this is going :lol: so when he was working in the shed and needed a leak, instead of going up the stairs to use the toilet and risk waking his wife, he had a tin put aside for the task in his shed. One day he needed to use the tin but noticed the level didn't seem to be rising much, but his feet, trousers and socks were getting wet...... cause the tin was peppered with holes to cut a long story short the sound of the washing machine woke up his wife and he now uses a glass jar. I was nearly crying when he told me the story :lol:

Sorry it's not that relevant to your question but hopefully it might make you chuckle

 

[Baldhead]

I once heard a very similar story regarding a tin corroding -
Husband and wife, the wife worked long unsociable hours so when getting home would request that hubby trys to keep the noise down so she can rest. The only toilet in the house is upstairs next to the bedroom..... can you guess where this is going :lol: so when he was working in the shed and needed a leak, instead of going up the stairs to use the toilet and risk waking his wife, he had a tin put aside for the task in his shed. One day he needed to use the tin but noticed the level didn't seem to be rising much, but his feet, trousers and socks were getting wet...... cause the tin was peppered with holes to cut a long story short the sound of the washing machine woke up his wife and he now uses a glass jar. I was nearly crying when he told me the story :lol:

Sorry it's not that relevant to your question but hopefully it might make you chuckle

Your right, it isn't relevant to my question, but it did make me laugh, my wife also works shifts, in my workshop/garage I have an old PLASTIC measuring jug, plastic doesn't corrode, I think I've said enough!!!

Baldhead

 

[ColeyS1]

I never knew these shed vessels were such a common thing
I've never had a tin leak from corrosion from the inside, but then most of its oilbased stuff.- im guessing the flag primer might be water based ?
I use dulux waterbased primer undercoat for mdf, a full tin rarely lasts a year do guess it doesn't get chance to rot through. I wonder if air might have got inside speeding up the process perhaps... :?

 

[Baldhead]

I never knew these shed vessels were such a common thing
I've never had a tin leak from corrosion from the inside, but then most of its oilbased stuff.- im guessing the flag primer might be water based ?
I use dulux waterbased primer undercoat for mdf, a full tin rarely lasts a year do guess it doesn't get chance to rot through. I wonder if air might have got inside speeding up the process perhaps... :?

Yes it's water based and it had been opened, I've never had any problems in the past with tins leaking due to corrosion, even after a couple of years after the paints been opened, I wondered if it was because of some additive being used as it was for MDF?

Baldhead

 

[celston]

I had the lid of a tin of pastewax completely rust through in about 2 years. Still no idea why! Other tins of finishes stored in the same cupboard didn't.

 

[AndyT]

I have a tin of Ronseal quick drying wood stain (water based) which I had stored for only about six years. When I opened it, letting air in the top, it leaked through several pinholes near the base. I've put some duct tape round the tin and it seems ok for a few more years yet.

 

[No skills]

Recycled metal with miscellaneous content. Dont make tins like they used to.

 

[ColeyS1]

I wondered if it was because of some additive being used as it was for MDF?

Baldhead

I used some hammerite special primer last night on some galvanise. I was quite surprised to find out that was water based so perhaps there might be some additive added to your primer.

 

[Baldhead]

I emailed Flag, they say if your going to store paint for a long period it is good practice to rotate the tin by storing on the lid every couple of months!

Baldhead

 

[Silas Gull]

Recycled metal with miscellaneous content. Dont make tins like they used to.

Yes, I would guess the leaks are due to anomalous impurities within the alloy. One of the properties I regularly get called out to was piped entirely with a particular batch of Spanish copper tube some 12 years ago. I refer to it as the pin-hole palace, a place that has provided me with much work and income.

 

[Phil Pascoe]

A place I worked had a lot of plumbing done during the mid '60's S. African copper embargo. You wouldn't believe how cheap stainless steel corroded.

 

[Bradshaw Joinery]

Ive seen metal stordage drums corroded from the inside before.

They were 45 gallon oil drums on a farm, where the farmer had stored all the waste oil from all the equipment etc. After many years there were lots of these drums, and now waste oil is actually worth a few pence a litre he decided to sell...

When the guy with the lorry turned up he said dont move the barrels ill suck the oil out. The farmer being a helpful chap thought he would ignore this advice and gett he barrels a bit closer for the old boy on the lorry.

He pulled the top of the barrel and it canted over, leaving the base ont he floor seperated from the sides and 200l of oil gushing over the floor.

Basically the oil float ont he water, and water corrodes the steel over time at the base of the cans. So store oil in plastic containers. Ibc's etc.