Gordon England Surface Engineering Forum



Re: Removal of Zinc Metal Spray from steel bridge.


Posted by Gordon England on July 24, 2003 at 11:08:41:

In Reply to: Removal of Zinc Metal Spray from steel bridge. posted by Stephen Fry on July 23, 2003 at 17:00:03:

: We are having 'economic' dificulties in removing metal sprayed zinc from a steel bridge deck (30 years old).Currently we have to resort to locally disc grinding after a single pass with a motorised shot blast unit.

: Is there some 'benign' chemical cleaner or etchant that might reduce the adhesion properties to the steel substrate, thereby making removal easier.
: Thank you,
: Steve Fry

Hi Steve

Why are you removing zinc coating and what is to happen to the stripped surface?

Acid pickling or rust removing solutions should attack and degrade zinc coating. I remember using concentrated hydrochloric acid with antimony trioxide additions for analytically purposes, which was very effective and left steel substrate completely free of attack. These methods are usually dip processes conducted in controlled enviroments. I think in your environment chemical stripping will be a very messy process and may not be that effective. Also, there would be serious concerns with regard to health and safety and environmental issues.

I think grit blasting would be the best option, particularly if you are planning to re-coat.


Follow Ups:


Surface Engineering Forum

Surface Engineering Message Board Archive

Surface Engineering Message Board Archive Index

Search Message Boards Archives

www.gordonengland.co.uk





GoogleCustom Search

Post A Message!

Gordon England Surface Engineering ForumPlease go to the new Surface Engineering Forum as this old message board is a read only archive. Please copy and paste relevant information or link to the page if you wish to reactivate a thread on the new forum.







Gordon England Independent Thermal Spray Coating Consultant
Telephone: +44 (0)1252 405186

PLEASE CLICK HERE TO EMAIL

Site Links

Introducing

Nature of Thermal Spray Coatings

Surface Engineering in a Nutshell

Surface Engineering Forum

Thermal Spray Gun Repair Service

Plasma Consumable Parts

Thermal Spray Powder Supplies

Applications:

Thermal Spray Coatings on Carbon and Glass Fibre Reinforced Polymers

HVOF Coating of Paper Making Roll

Abradable Coatings

Photomicrographs

Thermal Spray Processes:

Combustion Wire Thermal Spray Process

Combustion Powder Thermal Spray Process

Arc Wire Thermal Spray Process

Plasma Thermal Spray Process

HVOF Thermal Spray Process

Detonation Thermal Spray Process

Plasma Flame Theory

Cold Spray Coating Process



Wear and Use of Thermal Spray Coatings

Corrosion and Use of Thermal Spray Coatings

Glossary of Thermal Spray and Surface Engineering Terms

Image Directory for Thermal Spray Coatings

Plasma Gas Flow Information

Plasma Gas Flow Correction Calculator

Contact Form

Links to other interesting sites related to thermal spray and surface engineering

Reciprocal Links

Periodic Table of the Elements

SI Units

Calculators for Conversion between Units of Measurement

Hardness Testing

Surface Engineering Message Board Archive

Surface Engineering Message Board Archive Index

Search This Site


Photography Gallery2

Photography Gallery3


© Copyright Gordon England