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Our offer of hot dip galvanizing

Hot dip galvanizing

"Arsenal" Co LTD Company is ready on a regular basis to assist in placement and fulfillment of orders on hot dip galvanizing of metal constructions, pipes and etc. on Ukrainian, near and far abroad markets.

Requirements for items undergoing coating by the method of hot dip galvanizing according to (State Standard) ГОСТ 9.307-89

• Hot zincing is performed on constructions, made of low-carbon steel according to ГОСТ 380-94, 1050-88, 27772-88, and containing: carbon < 0.25%; silicon < 0.37% (preferably < 0.25%). It is better to use items of one brand to obtain a better exterior view. It is not permitted to perform zincing on constructions made of alloyed steel.
• Test zincing is possible if agreed with the client and if the steel not listed in the specified list is used. Cast iron items always undergo test zincing and during the process the quality of the surface is agreed with the client.
• There must be no pockets, closed cavities and air sacs in the constructions; all cavities have to be easy for liquid, melted zinc, air and flux decay products to access and exit.
• Shrinkage of constructions is possible in the process of zincing under the temperature influence.
• Long-length details (more than 2.8 m) have to have previously agreed technological openings at the ends (there can be a necessity to weld ears for hanging).
• Containers, drums, coiled pipes, assemblies with threaded joint are not meant for hot zincing.
• Pipes, branch pipes, boxes must not have plugs which complicate free zinc outlet from the inner volume of the item during vertical zincing.
• Drafts of constructions including welded assemblies have to be agreed with commercial department and the certificate for metal used has to be presented.
• Rolled-in scale, pores, hangnails, inclusions (welding slag, remains of molding mass, graphite, marking agent and lubrication, metal shavings) are not permitted on the surface of the main metal.
• Welding of construction elements has to be performed line-on-line or by double joints or one-sided joint with more welding.
• Welded joints of lap welds have to be closed along the line.
• Welded joints have to be uniform, compact and continuous along all the length (welding in СО2 environment is desirable).
• Pores, flaws, cracks, slag inclusions, floating couplings of welded joints are not permitted (scrapping of joints is obligatory, sandblaster is desirable).
• Metal constructions have to be delivered in packages according to grades and types and they have to have nameplates. Steel grade and weight have to be written on the nameplate.
• The thickness of coating as agreed with the client depending on the steel grade is possible from 80 till 120 mm.

A request with overall sizes of metal constructions, thickness and model of the metal has to be sent by fax or e-mail for the order to be performed. It is also preferable to indicate the desirable date for the project fulfillment. The answer for the request from Your enterprise will be given in 2-3 working days.

OTHER

Next services for protection of metal surfaces from corrosion are ready to be given after an additional agreement:

• Metallizated zinc coating
• Electrogalvanizing