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To position the Hot Dip Galvanizers Association of Southern Africa, comprising all its Members and other interested parties, as a professional organization serving the interests of all parties dependant upon the hot dip galvanizing industry. To develop and expand the demand for hot dip galvanizing, identify and develop new market opportunities for the benefit of Members and other Stakeholders.
The Hot Dip Galvanizers Association Southern Africa (HDGASA) is a not-for-profit trade association dedicated to serving the needs of specifiers, architects, engineers, contractors, fabricators and hot dip galvanizers throughout Southern Africa.
Provides free technical advice to members relating to their galvanizing plant, equipment, process controls, environmental protection and waste minimisation. Offers training in numerous aspects related to hot dip galvanizing, some of which are only available to members.
The association is a technical information center. Please use this link on our website to access information sheets, codes of practice, steel protection guides and to view case studies. These are at the disposal of specifiers, architects, engineers, contractors, fabricators and hot dip galvanizers to inform about the benefits of hot dip galvanizing.
The Association is proud to announce that all the back issues of Hot Dip Galvanizing Today are available for download in PDF format. Please note that some of the files are of a large size and will take a few minutes to download.
Presented annually, these awards represent the finest accomplishment in the use of hot dip galvanizing. For each category award, all project partners are considered winners as the nature of hot dip galvanizing is a combined effort, with the final project reflecting the work of many.
Provide technical assistance to end users, consultants and fabricators as to the appropriate application of hot dip galvanizing and duplex coating systems for corrosion control of carbon steel. Technical assistance and services are provided by means of presentations, inspections, setting of specifications and the provision of training.
Technical information on the hot dip galvanizing process can be imparted through seminars or presentations to end users, consultants, fabricators and galvanizers
Site visits to assess and report on the compliance with hot dip galvanizing standards and suitability for corrosion control.
An advisory service is available to evaluate and comment on all matters relating to hot dip galvanizing, duplex coating and general matters associated with corrosion control
Galvpatch is a zinc rich epoxy used for site repairs on hot dip galvanized components. The Metal Pro marker is soluble and removed during the pretreatment cleaning process. The Association and its members are a source of supply for this product.
Provide various training courses to enhance the understanding of hot dip galvanizing and its applications
Membership offers many benefits. The association offers technical advice and guidance in the application of hot dip galvanizing
The Association is a technical information centre established for the benefit of specifiers, consultants, end users and members. Contact the Association should you require a comprehensive presentation on various aspects of hot dip galvanized coatings including,
The contents of the presentation can be tailored to suit the requirements of the audience.
The HDGASA will carry out inspections wherever required for members and their customers.
Provide training and education for member companies to ensure a high standard of quality and service throughout the hot dip galvanizing industry.
Galvpatch is a zinc rich epoxy used for site repairs on hot dip galvanized components.
The marker is a soluble ink based marker used for component manufacture in the fabrication process.
Hot dip galvanizing is one of the most widely used methods of protecting steel from corrosion. During fabrication and after hot dip galvanizing, the coating is inspected for compliance with the relevant specifications.
2016 course dates for Introduction to Hot Dip Galvanizing and Certified Inspectors Course Level II
Provides free assistance to members with respect to quality aspects during fabrication, hot dip galvanizing and site inspections. The Association will investigate and objectively report on coating quality issues without compromising its creditability or professional reputation.
Offers technical advice relating to specifications, steels suitable for hot dip galvanizing and the optimum corrosive control measures to suit various environments.
The following case studies are most relevant to South African weather conditions and climate. Please click the links below to obtain further details.
To position the Hot Dip Galvanizers Association of Southern Africa, comprising all its Members and other interested parties, as a professional organization serving the interests of all parties dependent upon the hot dip galvanizing industry. To develop and expand the demand for hot dip galvanizing, identify and develop new market opportunities for the benefit of Members and other Stakeholders.
Case Study: #27 2015
The performance of Pandrol rail fasteners in a marine environment on the Natal South Coast
Case Study: #26 2014
Case Study: #25 2014
Case Study: #24 2013
Case Study: # 23 2013
Contact us today for further information on the Hot Dip Galvanizers Association of Southern Africa
Volume 12, Issue 2: September 2015 (61)
Volume 12, Issue 1: May 2015 (60)
Volume 11, Issue 3: November 2014 (59)
Volume 11, Issue 2: November 2014 (58)
Volume 11, Issue 1: November 2014 (57)
Volume 10, Issue 4: November 2013 (56)
Volume 13, Issue 1: April 2016 (62)
1. APPEARANCE OF SODIUM DICHROMATE
What is this?
A small amount of Sodium Dichromate is generally added to the quench water bath for passivation.
Although the recommended quantity of Sodium Dichromate is about 0.15 to 0.3%, occasionally when topping up, more is added. This often results in a dark yellow to brown colour on the galvanized surface. The darker colour will provide enhanced initial corrosion protection.
Effect / Remedy / Responsibility
This can be accepted since there is no adverse effect on corrosion control.
The galvanizer should maintain the concentration of Sodium Dichromate at about 0.15 to 0.3%.