One of the advantages of gold plating is that the electroplated coatings do not have pores as gilded coatings do. This has longer lifespan and is corrosion resistance. Gold plating can be used in electronics or in ornamental purposes. It has many benefits - changes from yellow to orange color, good corrosion resistance, high tarnish resistance, low contact resistance, low electrical resistance and excellent solder ability. Gold plated items are first plated with nickel, which provides added abrasion resistance and certain other benefits. Gold is soluble in solder. Solder which contains more than 5 percent gold can become weak. The joint surface has a dull finish.