![]() ![]() Please contact us for more details.Īlternatives to Zinc Plating for Corrosion Resistanceĭepending on your need, A Class can offer advice on zinc plating, or alternatives such as electroless nickel plating, for achieving corrosion resistant outcomes. It’s advantages as a finish (over other types) include brightness, ability to plate otherwise difficult to plate substrates, and lower levels of hydrogen embrittlement of parts.Ī Class Metal Finishers offers a range of zinc plating services, including some of the above. ![]() Acid zincĪcid zinc plating does not use cyanides in the process (sometimes used in alkaline types). It is a plated alloy of the two metals and in some cases it can be provided in colours of olive, blue, black or gold. Zinc cobaltĬobalt zinchas been said to offer more than 5 times the corrosion resistance of other zinc types and is very ductile. This type of coating is often achieved by tri-valent based processes which are more environmentally friendly than the hex-valent versions but offer lower corrosion resistance properties. Though clear zinc, you would imagine, has no colour, often it is referred to as blue as it can result in a blue-ish hue. The oxide-coated versions will tend to offer slightly better resistance due to the additional coating and depending on the underlying type of zinc used. The level of corrosion resistance of the latter will be somewhat lower than that of gold zinc – but better than clear passivate. Others use formulations that are actually black plated. Some suppliers use a black oxide coating or dye over the surface of zinc plating (e.g. Of all the zinc types it retains a good average level of corrosion resistance. Gold is its colour only – it does not contain actual gold. Yellow Zinc (Gold Zinc) is the most common type of zinc plating used in automotive parts finishing. The following briefly describes some of the common zinc colours/types: Zinc Gold Passivate Further, zinc plating types also vary in their ability to protect from both “red” (iron related) and “white” (alloy related) corrosion types – though we will not explore that any further here (call us if you wish to know more). Zinc plating comes in different colours – but each of the colours can result from the type of plating formulation used – meaning that they do not necessarily have the same resulting corrosion resistance properties as each other. Zinc Plated coatings are “sacrificial” coatings – meaning the coating sacrifices itself in order to protect the substrate beneath, as the coating oxidizes the corrosion itself continues to provide a level of protection to the substrate. The primary purpose of zinc plating is to protect metals from the effects of corrosion or rust. A Class currently provides some, but not all, of the zinc plating finishes mentioned below. The information provided on this page is to inform you about some aspects of zinc plating as a metal surface finishing choice. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |