Delta Specialty Coatings

     A Service-Disabled Veteran-Owned Plating Shop

Testing Capabilities

Delta Specialty Coatings has a state of the art testing laboratory that has capabilities far beyond what's typical in the coatings industry. Our Lab Director is a degreed chemist with over 40 years experience. Here are just a few of the QC tests that we perform:

Salt Spray (Fog) Testing: An accelerated corrosion test used to predict the suitability of a coating for use as a protective finish.

The three most common test methods are ASTM B117 (neutral salt spray); ASTM B287 (acetic acid spray); and ASTM B368 (CASS test).

Metallographic Cross-Sections: ASTM B487 is a common specification for "Measurement of Coating Thickness By Metallurgical Cross-Section". Photomicrographs are proof positive of coating thickness and they are required by many specs. (Exxon GP-56-02-13 is an example of a specification that we specialize in).

Cross-sections show us much more than plating thickness. At left is a crack in a steel substrate. On the right, we're looking at the root of a pit, as if looking down into it.

Cross-sections are an integral part of failure analysis (and prevention).

Hardness Testing: Hydrogen embrittlement is the bane of the coatings industry. Proper preparation of parts prior to, and after, plating is essential. ASTM D3363, E18-15 and many other specifications describe this test in detail.

X-Ray Fluorescence (XRF): A non-destructive means of identifying metallic coatings and measuring thickness with extreme precision.

ASTM B568 describes the test procedure.

Deposit Stress Testing: An important but often overlooked test that helps us to control the stress of an electrodeposited coating is the bent fork stress tests. Stress tests should be done routinely at all plating shops, as a matter of "best practice".

Adhesion Verification: If your plating shop doesn't control the stress of their deposit with the test described above, their coatings may peel away from the substrate material. There are many other causes of poor adhesion, not the least of which is poor cleaning. Quantitative and qualitative tests should be performed to assure that a coating is properly bonded to the substrate.

Common tests for adhesion are ASTM D3359 (tape), ASTM B571 (burnish) and ASTM D4541 (bend).

Cyclic Voltammetric Stripping (CVS): Brighteners and grain refiners are important components of almost all plating baths. If their concentrations are not controlled, the coatings produced by the baths will have inconsistent physical properties.

Shown below is a crack in electroplated copper that could have been prevented if this plating shop had measured brightener and organic contamination using CVS.

Surface Tension: (I threw this in because I like to say "stalagmometer". Practice pronouncing it a few times, then say it at a party. People will think you're smart). A stalagmometer is an essential lab tool, especially for nickel and chrome platers. Among other things, good control of surface tension allows plating solutions to "wet" inside narrow recesses. If a part isn't wet, it doesn't plate.

Hull Cells: Most plating shops do a hull cell test now and then. But learning to interpret them takes many years of experience.

Knowledge of how to "read" hull cells is probably the most important skill that a plating lab tech can learn.

Resistance to Solvents: Delta applies many different types of organic coatings. To assure that a coating such as Xylan is going to perform as expected, we check for proper cure per ASTM D5402.

Wet Lab: All plating shops must perform titrations so they can calculate the necessary additions to their baths.

Obviously, we can perform your testing as well as your coatings.

If you require a third party lab for testing, may I recommend:

Contact Us

For all quotes, consulting, questions, etc.
Contact: Mike Reeder

Phone: 713-645-6921
Fax: 713-645-3583
Mobile: 832-722-6703

Email Request for Quote or drawings to:
Feel free to call my cell phone after normal business hours. We offer 24X365 service when our customers require it. If you have questions about any coating, CALL. We are the coating experts on your team.

If Mike is not available, other points of contact:
Carlos Palma (VP, Operations)

Lisette Rosas (Office Manager)

As a metal finishing engineer, I will consult with you on which coating or specification best meets your requirements. If you do not find what you are looking for on this website, please call me. We are always looking for new challenges and will invest in new capabilities as demanded by the market. If we cannot perform the coating process, I will refer you to one of our esteemed competitors who can help you.

Oh yeah, Se habla Espanol! Everybody speaks Spanish here except the Canadian immigrant (our Senior Coatings Chemist).

Mike Reeder

Physical Address:
Delta Specialty Coatings LLC
5738 Heiser Street
Houston, TX 77087

Mailing Address:
PO Box 87460
Houston, TX 77287-7460