Real-World Proof: How Our Repairs Stand Up to Real-Life Situations

Industrial glass-linings face brutal conditions: acidic and alkaline chemicals, constant temperature swings, and mechanical wear. We tested our Permanent Glasslined Repair Technology under ASTM B08.12, ASTM B916-01, and ASTM C537-87 standards. 

Here’s what we found:

ASTM B08.12 

The test is based on the sensitivity of electrical contact interfaces to temperature and humidity changes experienced by electrical pressure connection systems. Temperature fluctuations can cause micromotion at the contact surfaces, exposing fresh metal to the atmosphere. Humidity can then accelerate corrosion on these newly exposed surfaces. Consequently, connection systems that fail to maintain stable metal-to-metal contact during thermal cycling and humidity exposure can experience degradation of the contact surface, indicated by an increase in potential drop.

Corrosion Resistance:

We exposed the repaired and control samples to 20% hydrogen chloride at 100°C for 132 hours.

·      The control glass had a 100-micron corrosion depth, while the test glass had a 300-micron corrosion depth after 132 hours of exposure to 50% NaOH at 50 °C. 

Thermal Shock Resistance:

·      Samples were heated to a maximum temperature of 320 °F and then submerged in ice water - neither disk experienced any spalling, cracking, or other damage. The control glass had a 375-micron corrosion depth; the test glass had a 350-micron corrosion depth after 1060 hours of exposure to Thermal Shock testing.

Abrasion Resistance:

A Modified G174-22 abrasive loop testing which is a Standard Test Method for Measuring Abrasion Resistance of Materials by Abrasive Loop Contact. Done on 6 control samples which were abraded, and one repair glass sample.

·      Weight loss for the glass sample was within the standard deviation of the control samples.

·      Examination of the abrasion scar under magnification showed no differences or discrepancies from the control glass.

ASTM N916-01

This test method's scope is to quantitatively determine the amount of enamel remaining after the porcelain enamel coating specimen has been deformed, standardize the deformation parameters for testing the adherence of porcelain enamel to sheet metal, and provide a quantitative adherence rating scale for comparison to reference standards.

·      This adherence test method applies to porcelain enamel coatings on substrates from 18 to 24 gauge (0.0478 to 0.025 in. or from 1.214 to 0.654 mm).

·      The values stated in inch-pound units are to be regarded as standard.

The values given in parentheses are mathematical conversions to SI units provided only for information and are not considered standard.

ASTM C537-87

This test method covers the determination of the reliability of glass coating on metal and is intended for use by manufacturers of equipment that is designed to withstand highly corrosive conditions where a failure of the coating in service would cause extreme damage to the exposed metal. Its use outside the manufacturer's plant is discouraged because improper or indiscriminate testing can cause punctures that are difficult to repair without returning the equipment to the manufacturer's plant. This test method detects not only existing discontinuities in the glass coating, but also areas where the glass may be thin enough to result in premature service failure.

Important Note:

Two corrosive environments were tested. Use coupons or other methods to assess corrosion performance for any potential application chemistry. The test glass was prepared on flat plates in a workshop setting. Similar results are expected for flat or concave surfaces, while convex surfaces may pose more of a challenge for this repair method. Overall, the test glass performed similarly to the control glass in our tests. In everyday operations, these conditions mirror real service stressors. When repairs meet or surpass factory standards, you can rely on the lining to perform well when it matters most.

Our results show you don’t have to settle for “good enough.” You can restore your assets to original performance and stay productive.