Saturday 18 November 2006

Rusty Links

Rusty Links


This is my exact mood right now. Moody. What do you expect me when I dropped my 350D on the cement ground and had my 50mm f1.8 lens broken and rolling onto the streets? This picture was also taken in Smith Street. Took many shots of this. I had use a zoom while shooting technique to create a "sucking" feeling into the picture. There was a lot of trial and error. Well, I think this was one of the best. The angle of the lock was parallel to the camera zoom streaks.



Rust is the chemical formed when iron compounds corrode in the presence of oxygen and water. It is a mixture of iron oxides and hydroxides. Rusting is a common term for corrosion, and usually is corrosion of steel.

Rust is iron(III)oxide, which is formed by the dehydration of iron(II) hydroxide. Corrosion tends to progress faster in seawater than fresh water due to higher concentration of sodium chloride ions, making the solution more conductive. Rusting is also accelerated in the presence of acids, but inhibited by alkalis, through passivation. Rust can often be removed through electrolysis, however the base metal object can not be restored through this method.

Galvanization consists of coating metal with a thin layer of another such metal. Typically, zinc is applied by either hot-dip galvanizing or electroplating. Zinc is traditionally used because it is cheap, easy to refine and adheres well to steel. Zinc also provides cathodic protection to metal that itself is unplated, but close enough that any water touching bare iron is also in contact with some zinc. The zinc layer acts as a galvanic anode rusting in preference. Galvanization often fails at seams, holes and joints, where the coating is pierced.

Bluing is a technique that can provide limited resistance to rusting for small steel items, such as firearms; for it to be successful, water-displacing oil must always be rubbed onto the blued steel.

To prevent rust corrosion on automobiles, they should be kept cleaned and waxed. The underbody should be sprayed to make sure it is free of dirt and debris that could trap moisture. After a car is washed, it is best to let it sit in the sun for a few hours to let it air dry. In winter, or in salty conditions, cars should be washed more regularly as salt (sodium chloride) can accelerate the rusting process.

(courtesy wikipedia.com)

4 comments:

Mike Hitchen said...

You have some great photos here - and I was interested in your comment about the Canon IXUS 400.

I had no interest in photography and bought the IXUS 400 so that I couls send photos to my fiancee in the US.

It took a year before I started to experiment beyond the usual "snapshot" but I am glad I did.

All the best
Mike

Anonymous said...

This photo gives a cold atmosphere. However, it is nice. I feel sad for u upon ur broken lens and cracked flash but nothing i can do. hehe...

about the galvanization, so i was right when we talked abt it before chem exam huh..."can be dipped in molten blah blah blah.."

cheers

De Foto said...

To mike hitchen.
It's a little nice camera. Quite robust i most say. Yeah, even though it's basic camera, it still can produce some stunning results too.

De Foto said...

To chandra,
haha. thank you for your sympathy. let's one minute of silence.. .... .... ok.. yar yar.. something like car frames in the olden days when it will be submerged to protect it.