galvanizing

/galvanizing

galvanizing

/galvanizing

Painting and Powder Coating on Hot Dip Galvanizing

A duplex coating is defined as a combination of two different coating systems which often complement one another, Typically this means a metallic coating overcoated by an organic system. Examples of such systems are hot dip galvanizing surfaces which have been painted or powder coated. Typically, a galvanized coating on its own will provide adequate [...]

By |2017-07-05T09:50:25+00:00November 11th, 2016|Categories: Design, Duplex Systems, galvanizing|0 Comments

Masking and Prevention of Hot Dip Galvanized Coating

When galvanizing a steel article, it may be desirable to prevent a coating from forming in certain areas which will have special functions such as: A threaded component on a fabrication Drilled holes Surfaces which will be subject to welding after galvanizing There are several different methods that may be used to prevent a [...]

By |2017-07-05T10:05:15+00:00November 11th, 2016|Categories: Design, galvanizing|0 Comments

Renovation of Hot Dip Galvanized Steel

The galvanized coating applied by immersion in a bath containing molten zinc not only provides a high level of corrosion protection but is also very robust, such that it will normally withstand handling and erection. However, the coating may occasionally be subject to small areas of mechanical damage typically as chips at edges or [...]

By |2017-07-05T10:11:58+00:00November 11th, 2016|Categories: galvanizing, Performance|0 Comments

Hot Dip Galvanized Castings

Galvanizing of castings is covered by EN ISO 1461:2009. Hot dip galvanizing of cast iron provides excellent protection from corrosion and the coating is applied by immersion in molten zinc at 450°C forming a tough, adherent coating which is bonded to the base metal by series of zinc-iron alloy layers overlaid with free zinc. If [...]

By |2017-07-05T10:18:24+00:00November 11th, 2016|Categories: Design, galvanizing|0 Comments

Wet storage stain

Hot dip galvanizing provides a high level of corrosion protection due to the slow rate at which it corrodes in an atmospheric environment. Part of the protection is provided by a zinc carbonate patina, which forms on the galvanized surface over a period of time by reaction of atmospheric carbon dioxide with a thin [...]

By |2017-07-05T10:24:11+00:00November 11th, 2016|Categories: galvanizing, Performance|0 Comments

Bimetallic Corrosion

When two dissimilar metals come into direct contact and an electrolyte such as moisture is present, a battery cell is created and an electrical current flows. This causes the more electronegative or anodic metal as determined from the electro-chemical series (see below) to corrode more rapidly. This means that galvanizing being a zinc coating will [...]

By |2017-07-05T11:00:51+00:00November 11th, 2016|Categories: galvanizing, Performance|0 Comments

Avoiding Distortion During Hot Dip Galvanizing

In practice, cases of distortion during hot dip galvanizing are relatively infrequent. There are a number of important criteria that designers should keep in mind. Causes Distortion occurs due to the relief of locked-in stresses within a steel section or fabrication. At room temperature, the steel is sufficiently strong to accommodate such stresses, but [...]

By |2017-07-05T11:09:14+00:00November 11th, 2016|Categories: Design, galvanizing|0 Comments

Considerations before Hot Dip Galvanizing: Handling During the Process

Hot dip galvanizing is the process of coating iron or steel articles with a layer of zinc by immersing the metal in a bath of molten zinc at a temperature of around 450°C. There are many galvanizing plants within the UK and Republic of Ireland, all of whom offer a variety of galvanizing bath [...]

By |2017-07-05T11:31:05+00:00November 11th, 2016|Categories: Design, galvanizing|0 Comments

Welding Before and After Hot Dip Galvanizing

A proportion of steelwork that is hot dip galvanized is subject to fabrication by welding prior to dipping. The welding process can affect galvanizing in terms of coating quality, distortion and creating an increased potential for cracking in isolated instances. By taking suitable actions these issues may be alleviated. Coating Quality During the welding [...]

By |2017-07-05T11:35:36+00:00August 30th, 2016|Categories: galvanizing, Welding|0 Comments

Hot Dip Galvanizing Process

Hot dip galvanizing is the process of coating iron or steel articles with zinc by immersing the metal in a batch containing molten zinc at a temperature of around 450°C. During the process, a mettalugically bonded coating is formed which protects the steel. The majority of galvanizing plants can accept a wide variety of [...]

By |2017-07-05T11:39:50+00:00August 30th, 2016|Categories: galvanizing, HDG Process|0 Comments