ASTM C813 Test for Hydrophobic Contamination on Glass by Contact Angle Measurement
ASTM C813 detects hydrophobic contamination on glass surfaces by measuring the contact angle. Hydrophobic contaminants are organic molecules sticking on the glass surface. The test is used to detect hydrophobic contaminants on glass that harbors when exposed to ambient end use conditions. Values are expressed in SI units.
Scope:
ASTM C813 detects layers of organic molecules by observing the contact angle measurements. Organic molecules change the contact angle of glass. The contact angle is the angle where a liquid-vapor interface meets a solid surface. It quantifies the wettability of a solid surface by a liquid via the Young equation.
The data from the contact angle test is used to evaluate processes that remove hydrophobic contaminants. It is used to detect glass that harbors hydrophobic contaminants when exposed to ambient conditions. For this, a surface free of organic films is exposed to the ambient conditions and is later tested.
Test Procedure:
In ASTM C813 testing, drops of permanganate-distilled water are deposited on the glass surface using a mounted hypodermic syringe to measure the advancing contact angle. The contact angle is measured by either (1) viewing a sessile drop through a comparator microscope with a goniometer scale; or (2) photographing a sessile drop and measuring the angle with a protractor.
Organic contamination on surfaces leads to contact angles higher than the near-zero angles seen on clean surfaces. The sensitivity of this test decreases if the surface is rough or porous, or if the surface has hydrophilic substances.
Data:
The contact angle measured on the glass surface is reported. As per ASTM C813, the surface is free of hydrophobic contaminants if the advancing angle is not greater than 5°.
Conclusion:
ASTM C813 detects hydrophobic contamination on glass surfaces by measuring the contact angle.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 is a standard test method for the analysis of sulfochromate etches solution used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
Send us a request
Process for testing
STEP 01
You share material and testing requirements with us
STEP 02
We ensure your sample pick-up in an ensured manner
STEP 03
We deliver test report to your inbox
Just share your testing requirements and leave the rest on us!
Free, no-obligation consultation
Guaranteed confidentiality
Quick turnaround time
Hassle-free process
Let us combine our capabilities to achieve success!!