Then remove the remaining oil or grease by any of the following methods: Anyone making use of this information assumes all liability arising from such use. SSPC-SP1 removes oil and grease before cleaning with hand tools, and compressed air or a vacuum will remove dust after this cleaning procedure is completed. D describes the same process, but without mentioning the surface preparation standard. Did you find this article useful? The ASTM specifications relevant to the hot-dip galvanizing industry often reference these surface preparation standards.
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Methods of Solvent Cleaning 4. Then remove the remaining oil or grease by any of the following methods: I am at least 16 years of age. Prior sspc sp1 performing solvent cleaning, it is best if dust is removed from the surface of interest. We will be updating and growing this site with more and more of industrial inspection related articles. I understand that you will use my information to send me a newsletter.
SSPC Surface Preparation Standards | American Galvanizer’s Association
In order to successfully follow SSPC-SP 1, you ssp to take steps prior and post this requirement to complete the specification of solvent cleaning. ASTM A calls for a near-white metal blast cleaning when field conditions include immersion.
However, metals with an existing sspc sp1 acceptable for painting can be cleaned with waterjetting to expose the existing profile. However, A uses the white metal blast as sl1 surface preparation standard for repairing a zinc coating using sprayed sspc sp1.
This sspc sp1 best done by using any of the accepted methods listed. After a galvanized surface has been acceptably cleaned of oil, grease, and similar products, this brush blasting can spsc applied in order to create an acceptable profile.
Solvents can be directly applied onto the surface, used on scrubbing brushes or rags, or surfaces being immersed in the solvent.
SSPC Surface Preparation Standards
This fact makes power-tool cleaning an acceptable method for surface preparation of a hot-dip galvanized coating after it has been cleaned.
Here is a list and brief summary of the surface preparation standards used in the hot-dip galvanizing industry with a brief summary of each. For emulsion, alkaline cleaners, and steam be sure to finish the method by cleaning the surface with fresh water or steam.
After treatment, wash the surface with fresh sspc sp1 or steam to remove detrimental residues.
The surface shall be cleaned of oil, grease, and dust after the near-white metal blasting procedure. Use clean solvent and clean rags or brushes for the final wiping.
SSPC-SP2 Hand Tool Cleaning This standard covers the removal sspc sp1 loose mill scale, loose rust, loose paint, and other loose detrimental foreign matter from surfaces with the use of non-powered hand sspc sp1. Hot-dip galvanized coatings contain a layer of zinc oxide and zinc hydroxide which would be detrimental to the adherence of a topcoat.
Regardless of which solvent is used caution is always advised. The best way to avoid spreading the contaminants is to use contaminant free solvents for the final steps. SSPC-SP5 provides conditions for the end condition of a white metal blast, and the materials and procedure necessary for providing the end condition. Sspc sp1 states that sspc sp1 should be performed as soon as possible after power-tool cleaning or surface grinding.
It is highly recommended that precaution be taken when selecting your solvent. Take note some solvents can be combined, and all solvents should be used under special care due to their hazardous nature.
A paint coating also requires a profile typically not found on the relatively smooth surface of a hot-dip galvanized coating. D also considers the two methods interchangeable during the surface cleaning phase of the process.
The standard includes using rotary, impact, or power brushing tools to remove stratified rust, weld slag, and mill scale. Waterjetting is the use of standard jetting from a nozzle at high pressures 10, psi or higher to prepare a surface for coating.