Black rust

[Greybeard]

Originally Posted by kulbuntet

dilute vinegar

Thank you, Kulbuntet. Would grapefruit juice or pineapple juice also help? Seems less aggressive to me than vinegar.

Regards,

Heinz

[kulbuntet]

Hello Heinz,

You can always try. I prefer Diluted Vinigar for think black rust. And brush it away with a brass bursh. It works fine for me. The vinigar is not a strong acid, and les strong iff you dilute it a bit. It wil destroy the stucture of the rust, what you can bush of the next day.

Regards Abdulrahman (formerly Michel)

PS you can also have a look at this product. I realy works!!
Bio deruster link

[Greybeard]

Originally Posted by kulbuntet

Hello Heinz,
PS you can also have a look at this product. I realy works!!
Bio deruster link

Hello Abdulrahman,

Very interesting product! I think I'll try diluted vinegar first.

Thanks and regards,

Heinz

[Sajen]

Hello Heinz,

what works fine and certain is lemon acid you can buy in the supermarket. I use a drain pipe closed at one side and hang the blade inside, when you contol it time by time the acid only destroy the corrosion. This blade for example is cleaned by lemon acid.

Regards,

Detlef

[Greybeard]

Hello Detlef,

Very nice result! I see that there are several options. I'll just have to try ...

I have always been very hesitant in using acidic solutions for cleaning purpose on metal surfaces. Being a long-time firearms collector, I believed in the formula
iron/steel + acid = corrosion.

The keris that I intend to clean is -- except for several black rust spots -- a very nice dapur Parungsari in a grey/white condition with smooth edges and beautifully executed luk rengkol. All I want is to preserve it in this shape.

Regards,

Heinz

[Sajen]

Originally Posted by Greybeard

Hello Detlef,

Very nice result! I see that there are several options. I'll just have to try ...

I have always been very hesitant in using acidic solutions for cleaning purpose on metal surfaces. Being a long-time firearms collector, I believed in the formula
iron/steel + acid = corrosion.

The keris that I intend to clean is -- except for several black rust spots -- a very nice dapur Parungsari in a grey/white condition with smooth edges and beautifully executed luk rengkol. All I want is to preserve it in this shape.

Regards,

Heinz

Hello Heinz,

when you clean a blade in the way I have described and control it by time and don't let it to long inside only the corrosion going. I have cleaned many different blades like this and every time have had good results.

Regards,

Detlef

[Greybeard]

Thank you, Detlef. I think I'll try it coming weekend.

Regards,

Heinz