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An Organometallic Ester Corrosion Inhibitor for Use in Direct-to-Metal Acrylic Paints

Picture for An Organometallic Ester Corrosion Inhibitor for Use in Direct-to-Metal Acrylic Paints
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Traditionally, the light industrial/general maintenance paint systems involved a primer along with multiple coats of acrylic finish paint to achieve acceptable corrosion resistance over mild steel substrates.  The new Direct-To-Metal (DTM) acrylic paints are formulated to eliminate the primer and perform as a primer and as a tough finish coat in a single paint, reducing the time and materials needed for complete coverage

Product Number: 41212-681-SG
Author: John E. Hughes
Publication Date: 2012
Industry: Coatings
$0.00
$20.00
$20.00

Traditionally, the light industrial/general maintenance paint systems involved a primer along with multiple coats of acrylic finish paint to achieve acceptable corrosion resistance over mild steel substrates.  The new Direct-To-Metal (DTM) acrylic paints are formulated to eliminate the primer and perform as a primer and as a tough finish coat in a single paint, reducing the time and materials needed for complete coverage.  The disadvantages of using the DTM acrylic paints are that when used on mild steel substrates they show poor corrosion resistance and flash rust upon application.  A new organometallic ester (OME) corrosion inhibitor was developed to improve the corrosion resistance of the DTM acrylic paints when used over mild steel substrates.  The OME corrosion inhibitor, when added in at up to 2.0% by weight as a post-addition to the existing DTM acrylic paints, improved 5% salt fog resistance from up to 48 hours before failure of the coating to greater than 370 hours before failure of the coating, with no detrimental effects observed on the other desired performance properties.  The new OME corrosion inhibitor is a significant development for the DTM acrylic paint market for mild steel alloys because it dramatically improves the corrosion resistance of the DTM acrylic paints while remaining free from toxic heavy metals and VOC-containing solvents.

Traditionally, the light industrial/general maintenance paint systems involved a primer along with multiple coats of acrylic finish paint to achieve acceptable corrosion resistance over mild steel substrates.  The new Direct-To-Metal (DTM) acrylic paints are formulated to eliminate the primer and perform as a primer and as a tough finish coat in a single paint, reducing the time and materials needed for complete coverage.  The disadvantages of using the DTM acrylic paints are that when used on mild steel substrates they show poor corrosion resistance and flash rust upon application.  A new organometallic ester (OME) corrosion inhibitor was developed to improve the corrosion resistance of the DTM acrylic paints when used over mild steel substrates.  The OME corrosion inhibitor, when added in at up to 2.0% by weight as a post-addition to the existing DTM acrylic paints, improved 5% salt fog resistance from up to 48 hours before failure of the coating to greater than 370 hours before failure of the coating, with no detrimental effects observed on the other desired performance properties.  The new OME corrosion inhibitor is a significant development for the DTM acrylic paint market for mild steel alloys because it dramatically improves the corrosion resistance of the DTM acrylic paints while remaining free from toxic heavy metals and VOC-containing solvents.

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