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Friday, 20 September 2019
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Raw materials & technologies

Polyesteramide resin protects steel against corrosion

Wednesday, 7 August 2013

Long polyesteramide resin has the ability to accelerate the drying time of asphalt cement. Egyptian researchers developed a blend of these two materials as a new anti-corrosive coating for steel protection.

The blend of asphalt cement and polyesteramide resin protects steel against corrosion 

Source: Eric Zholumbetov / Fotolia

The blend of asphalt cement and polyesteramide resin protects steel against corrosion 

Source: Eric Zholumbetov / Fotolia

Asphalt cement is a material commonly used in coating applications due to its good adhesion properties and relatively low cost. Unfortunately, it has the drawback of being slow to dry. Long polyesteramide resin (PEA) is predominantly used for air-dry and force-dry industrial coatings onto metal surfaces, yet is considered to be a relatively weak material.

Faster drying times with PEA resin

Egyptian researchers focused on the potential synergy of mixing asphalt cement, of penetration grade 60/70, with PEA resin to produce industrial coatings for steel applications, with the aim of overcoming the slow drying time of the asphalt cement and the relative weakness of PEA resin. To achieve this aim, PEA resin was mixed with asphalt cement in a range of concentrations from 3 to 12 % (w/w). The prepared coating blends were characterised physically using Scanning Electron Microscopy (SEM), while the performance of the coatings were evaluated for mechanical properties and corrosion resistance in selective chemical reagents, following complete immersion for the duration of 84 days.

Blend of asphalt cement and PEA resin as anti-corrosive material

The results obtained concluded that generally, a blend of asphalt cement and PEA resin produces an effective material for industrial coating applications. Also, 9 % and 12 % PEA resin content produced high-quality anti-corrosive material as compared to virgin asphalt cement. The degree of modification depends upon the properties of the asphalt and the content level of the PEA.

More information about this study:

Progress in Organic Coatings, Volume 76, Issue 10, 2013, pp 1363-1368.

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