Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
D6266-00 – Standard Test Method Technical Guide
📐 Test Method Overview and Scope
This test method, designated D6266-00 (Reapproved 2023), describes the determination of volatile organic compound (VOC) released from applied waterborne automotive coatings that is available for delivery to a VOC control device. The determination is accomplished by measuring the weight loss of a freshly coated test panel subject to evaporation or drying and by analysis of the VOC or water content in the coating.
The method is applicable to VOC released from application and baking operations after the paint has been applied in a simulation of a production process, or in an actual production facility. Symbols and calculations are incorporated from Practice D3960, EPA 450/3-88-018, and EPA 450/3-84-019. The majority of symbols and calculations used in this test method are unique because it deals with differences in weight of applied paint samples that have been subject to drying, curing, or solvent addition.
⚠️ Safety: It is the responsibility of the user to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use (Section 1.5).
⚙️ Test Procedure and Key Measurements
The determination involves measuring the weight loss of a freshly coated test panel subject to evaporation or drying. The test panel must be prepared to simulate production conditions, with weight loss recorded over time. Analysis of VOC or water content in the coating is performed using methods such as Test Method D2369 for volatile content or Test Method D4017 for water content by Karl Fischer titration.
Key measurements include the weight loss of the panel and the water content to calculate the amount of VOC released. The method allows for solvent addition or curing variations to mimic different production scenarios. It is recommended to perform several practice runs and evaluate laboratory repeatability before testing actual samples, as noted in the standard.
| 📏 Standard | 🎯 Title | ⚡ Application |
|---|---|---|
| D2369 | Test Method for Volatile Content of Coatings | Determines volatile content |
| D3960 | Practice for Determining VOC Content of Paints and Related Coatings | VOC calculation methods |
| D4017 | Test Method for Water in Paints and Paint Materials by Karl Fischer Method | Water content analysis |
| D1475 | Test Method for Density of Liquid Coatings, Inks, and Related Products | Density measurement |
| D2697 | Test Method for Volume Nonvolatile Matter in Clear or Pigmented Coatings | Volume nonvolatile content |
| E691 | Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method | Precision evaluation |
💡 Tip: Ensure test panel preparation closely simulates actual production conditions, including application and baking processes, for representative results (Note 1).
📊 Key Measured Properties and Their Importance
The primary property measured is the weight loss of the coated panel, which directly correlates with the amount of VOC released. Water content analysis is particularly important for waterborne coatings to differentiate between water evaporation and VOC emissions, ensuring accurate emission calculations. The test method also incorporates specifications for ovens (E145) and reagent water (D1193) to maintain consistency.
The calculations from Practice D3960 and EPA protocols provide a standardized approach to quantify VOC available for removal in abatement systems. Precision of the test method can be evaluated using Practice E691.
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D6266-00? It describes the determination of VOC released from applied waterborne automotive coatings that is available for removal in a VOC control device, covering both application and baking operations in simulated or actual production facilities.
💡 Why is water content analysis critical in this test method? In waterborne coatings, water evaporation can contribute to weight loss; thus, water content analysis helps accurately determine the fraction of weight loss due to VOC release, ensuring precise emission quantification.
⚡ Which EPA protocols are referenced in this standard? The standard incorporates EPA 450/3-88-018 for determining daily VOC emission rates for topcoat operations and EPA 450/3-84-019, among others, to support VOC calculations.
📌 What are the key ASTM standards referenced? Key standards include D2369 for volatile content, D3960 for VOC determination, D4017 for water analysis, D1475 for density, D2697 for volume nonvolatile matter, and E691 for precision assessment.