White corrosion on videocard

I have White corrosion on my video card, how is it possible that the corrosion gets there, is this because of bad materials? Can this impact the lifetime of my card?

It appears to be the result of the manufacturing process. As you can see, the residue follows a fairly clean line around solder terminations. Therefore, it is likely the card was not cleaned properly after being fluxed and soldered.

Although this article is old, here is a paper discussing the white residue - THE NATURE OF WHITE RESIDUE ON PRINTED CIRCUIT ASSEMBLIES

As far as affecting the life of the card. That depends on what chemical it is. I would say that if you have been using the card successfully for more than 2 years, you are probably alright. If this were new from the box, I would be more concerned.

The "corroded" areas are areas where components were added (possibly by hand) in the construction process after the main automated assembly.

From the shape of the patterns, probably dip or wave soldering was used for these areas, and this leaves a thin coat of flux on the board which slowly turns white over time. This flux is "mostly harmless", but can slightly contribute to corrosion down the road.

You can try cleaning with alcohol, though it may not work very well. The "old standard" for flux removal was carbon-tet (now a no-no), and I don't know what they use now.