Coatings can be tested at TQP either chemically or physically; examples of these tests are density, pH, viscosity, conductivity, volatile content, binder content, ash content, pigment content, color coordinates, gloss, etc.
Thermoplastic coatings or Road marking materials are also within TQP testing scope. TQP can verify the compliance of such coating to AASHTO specification M249 also the compliance of their glass beads to AASHTO M247. Examples of these tests are glass bead content, pigment content, flowability, softening point, flash point, aging tests (UV, Salt spray, heat) etc.
Coatings Tests
| Coatings | Test Method | Description |
|---|---|---|
| Alkaline resistance of paint | NIS 278 | This test helps in determining the degree to which paint resists reaction with alkaline materials such as lime, cement, plaster, soap, etc.; a necessary property for paints in bathrooms, kitchens, laundries. |
| Ash content of paint at 450°C | TQP | This test method covers the determination of the ash content of paints at 450°C |
| Ash content of paint at 900°C | TQP | This test method covers the determination of the ash content of paints at 900°C |
| Binder content of paint | ASTM D3723 | This test method covers a procedure for the binder content determination of water-based paints. It is applicable only to pigments that do not decompose or lose weight at temperatures below 500°C. Such pigments include most metal oxides, silicates, and a majority of anhydrous inorganic salts. |
| Binder content of thermoplastic materials | ASTM D3723 | This test method covers a procedure for the binder content determination of water-based paints. It is applicable only to pigments that do not decompose or lose weight at temperatures below 500°C. Such pigments include most metal oxides, silicates, and a majority of anhydrous inorganic salts. |
| Calcium carbonate content of paint materials | TQP | This test method covers the determination of the calcium carbonate content of paint materials |
| Calcium carbonate content of thermoplastic materials | TQP | This test method covers the determination of the calcium carbonate content of thermoplastic materials |
| Chemical resistance of paint | ASTM D 1308 | This test method covers determination of the effect of household chemicals on clear and pigmented organic finishes, resulting in any objectionable alteration in the surface, such as discoloration, change in gloss, blistering, softening, swelling, loss of adhesion, or special phenomena. |
| Chemical resistance of thermoplastic material | ASTM D 543 | These practices cover the evaluation of all plastic materials including cast, hot-molded, cold-molded, laminated resinous products, and sheet materials for resistance to chemical reagents. These practices include provisions for reporting changes in weight, dimensions, appearance, and strength properties. Standard reagents are specified to establish results on a comparable basis. Provisions are made for various exposure times, stress conditions, and exposure to reagents at elevated temperatures. |
| Coarse particle and foreign matters in paint | ASTM D185 | These test methods cover the determination of the amount of coarse particles in dry pigments.In production of paints, smoothness of the paint film is of paramount importance. Agglomerates or coarse particles larger than 45 μm are difficult to disperse and may prevent obtaining a smooth film. These test methods are a valuable quality control test for grading raw materials. |
| Compatibility test on application of two layers of two different paints | TQP | Test the adhesive force between two different layers of paints |
| Conductivity of paints | TQP | Tests the electrical conductivity of paints |
| Degree of settling of liquid membrane forming materials | ASTM D869 | This test method covers the determination of the degree of pigment suspension and ease of remixing a shelf-aged sample of paint to a homogeneous condition suitable for the intended use. |
| Degree of settling of paints (Accelerated method) | ASTM D1309 | This test method covers a laboratory procedure for simulating in 2 weeks the settling that might occur in traffic paint during approximately 12 months' normal storage. |
| Degree of settling of paints (long term storage) | ASTM D869 | This test method covers the determination of the degree of pigment suspension and ease of remixing a shelf-aged sample of paint to a homogeneous condition suitable for the intended use. |
| Density of paints | ASTM D1475 | This test method covers the measurement of density of paints, inks, varnishes, lacquers, and components thereof, other than pigments, when in fluid form. Density is weight per unit volume. It is a key property in the identification, characterization, and quality control of a wide range of materials. |
| Dilution stability of paint | NIS 278 | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Dried binder content of emulsions | ASTM D3723 | This test method covers a procedure for the pigment content determination of water-based paints. It is applicable only to pigments that do not decompose or lose weight at temperatures below 500°C. Such pigments include most metal oxides, silicates, and a majority of anhydrous inorganic salts. Many water-based paints contain pigments and organic colorants that lose water of hydration or decompose at this temperature. The residual ash should be carefully inspected for changes in color or texture that could indicate a pigment alteration and hence lead to erroneous results. |
| Drying time of liquid membrane forming materials | ASTM C309 | This test method is used to determine the length of time for a liquid membrane-forming curing compound to dry to the touch and develop into a film that will not track off the concrete. |
| Drying time of paints (Ballotini's method) | ISO 1517 | This test specifies a method for determining the surface-drying characteristics of a coating of a paint or varnish which dries by the action of air or chemical reaction of its components. |
| Evaluation of degree of blistering of paint | ISO 4628-P2 | This part of ISO 4628 describes a method for assessing the degree of blistering of coatings by comparison with pictorial standards. The pictorial standards provided in this part of ISO 4628 illustrate blisters in the sizes 2, 3, 4 and 5, and each size in the quantities (densities) 2, 3, 4 and 5. |
| Evaluation of degree of chalking of paint | ISO 4628-P6 | This part of ISO 4628 describes a method for assessing the degree of chalking of coatings by comparison with pictorial standards |
| Evaluation of degree of cracking of paint | ISO 4628-P4 | This part of ISO 4628 describes a method for assessing the degree of cracking of coatings by comparison with pictorial standards |
| Evaluation of degree of flaking of paint | ISO 4628-P5 | This part of ISO 4628 describes a method for assessing the degree of flaking of coatings by comparison with pictorial standards |
| Evaluation of degree of rusting of paint | ISO 4628-P3 | This part of ISO 4628 describes a method for assessing the degree of rusting of coatings by comparison with pictorial standards |
| Floating of thermoplastic materials | AASHTO M 249 | Glass beads extracted from thermoplastic materials are tested for their flowability over specific solvent. |
| Flowability of thermoplastic materials | AASHTO T250 | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Freeze-Thaw resistance of water-borne coatings | ASTM D2243 | This test method covers a procedure for evaluating the effect of freeze/thaw cycling on the viscosity and visual film properties of water-borne coatings |
| Gasing test of paint (for one week) | ASTM manual of painting coating | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Gasing test of paint (for second week) | ASTM manual of painting coating | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Glass bead content of thermoplastic materials | AASHTO T 250 | This test method determines the percent of glass bead in thermoplastic materials. Acid-insoluble fillers will affect the glass-sphere analysis and must be removed by some physical separation method or accounted for quantitatively, or both. |
| Grading analysis of glass beads | AASHTO T 250 | Perform a visual inspection of the material larger than 100 mesh to determine that the sample is composed of glass beads only. Any material other than glass beads that are insoluble in the acid wash will appear irregular and opaque. Presence of this type of material in sizes larger than 100 mesh constitutes a failure to comply with the specification or inadequate HCl digestion. Glass beads extracted from thermoplastic materials are tested for their grading and conformance to specified limits |
| Heat resistance of thermoplastic materials | TQP | The heat resistance of a thermoplastic material is determined by subjectinga thermoplastic panel to a constant temperature for a specific period of time. |
| Lead chromate content in yellow thermoplastic materials | TQP | This test method determines the Lead chromate content in yellow thermoplastic materials by volumetric analysis. |
| Lead content of paint by EDTA method | ASTM D2374 | This test method covers a titrimetric determination of lead in liquid paint driers that can be dissolved in glacial acetic acid and utilizes the disodium salt of ethylenediaminetetraacetic acid (EDTA). |
| Non-volatile content of Latexes | ASTM D4758 | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Non-volatile content of liquid membrane materials | ASTM D2369 | This test method describes a procedure for the determination of the weight percent volatile content of solventborne and waterborne coatings. Test specimens are heated at 110 ± 5°C for 60 min. |
| Non-volatile content of paint | ASTM D2369 | This test method describes a procedure for the determination of the weight percent volatile content of solventborne and waterborne coatings. Test specimens are heated at 110 ± 5°C for 60 min. |
| pH of paint | TQP | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Pigment content of emulsions | ASTM D3723 | This test method covers a procedure for the pigment content determination of water-based paints. It is applicable only to pigments that do not decompose or lose weight at temperatures below 500°C. Such pigments include most metal oxides, silicates, and a majority of anhydrous inorganic salts. |
| Pigment content of paint by low-temperature ashing | ASTM D4451 | This test method covers the pigment content of paints and several traffic marking materials (thermoplastic and preformed tape) by low-temperature furnace ashing. Some organic pigments may be lost by this method and some water or moisture contained in pigments will be lost. |
| preparation and conditioning of paint sample | ISO 1513 | This standard specifies a method for the preparation and conditioning of paint sample |
| Pull-off test for adhesion | BS EN 1348 | This standard specifies a method for the determination of the tensile adhesion strength of cementitious ceramic tile adhesive. This standard is applicable to all cementitious adhesives and cementitious adhesives with separate components for internal and external ceramic tile installations on walls and floors |
| Resistance of paint to kerosene | NIS 278 | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Resistance of paint to staining | NIS 278 | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Resistance of paints to liquids - Spot test | ISO 2812-1 | TQP uses chemical and physical testing, either destructive or non-destructive, to verify the quality of your product. |
| Settling of membrane materials (Accelerated method) | ASTM D1309 | This test method covers a laboratory procedure for simulating in 2 weeks the settling that might occur in traffic paint during approximately 12 months' normal storage. |
| Softening point of thermoplastic materials | AASHTO M 249 | This test method covers the determination of the softening point of thermoplastic materials in the range from 30°C to 157°C [86°F to 315°F] using the ring-and-ball apparatus immersed in distilled water [30°C to 80°C] or USP glycerin (above 80°C to 157°C). |
| Solubility of thermoplastic materials | TQP | Thermoplastics are soluble in appropriate solvents whereas thermosets may swell but are insoluble. |
| Specific gravity of thermoplastic materials | ASTM D153 | These test methods cover three procedures for determining the specific gravity of pigments. The specific gravity value obtained by these procedures may be used with the weight of a dry pigment to determine the volume occupied by the pigment in a coating formulation. |
| Stability of Emulsion (long method) | TQP | The process by which an emulsion completely breaks (coalescence), i.e., the system separates into bulk oil and water phases, is generally considered to be governed by four different droplet loss mechanisms, i.e., Brownian flocculation, creaming, sedimentation flocculation and disproportionation. The first three are the primary methods by which emulsions are destabilized but all four processes may occur simultaneously and in any order |
| Stability of Emulsion (quick method) | TQP | The process by which an emulsion completely breaks (coalescence), i.e., the system separates into bulk oil and water phases, is generally considered to be governed by four different droplet loss mechanisms, i.e., Brownian flocculation, creaming, sedimentation flocculation and disproportionation. The first three are the primary methods by which emulsions are destabilized but all four processes may occur simultaneously and in any order |
| Volatile organic content of paints (VOC) | ASTM D3960 & D1475 | This practice discusses applicable ASTM test methods used in the determination of the VOC content of paints and related coatings and provides equations for calculating the VOC content expressed as the mass of VOC: (1) per unit volume of coating less water and exempt volatile compounds, and (2) per unit volume of coating solids and (3) per unit mass of coating solids. Volatile organic compound content is used to compare the amount of VOC released from different coatings used for the same application, that is, to coat the same area to the same dry film thickness (assuming the same application efficiency). VOC content data are required by various regulatory agencies. |
| Volatile organic of liquid membrane materials (VOC) | ASTM D3960 & D1475 | This practice discusses applicable ASTM test methods used in the determination of the VOC content of paints and related coatings and provides equations for calculating the VOC content. |
| Water retention of liquid membrane forming materials | ASTM C156 | This test method covers laboratory determination of the efficiency of liquid membrane-forming compounds for curing concrete, as measured by their ability to reduce moisture loss from mortar specimens during the early hardening period. |
| Water retention test of paints | ASTM C156 | This test method covers laboratory determination of the efficiency of liquid membrane-forming compounds for curing concrete, as measured by their ability to reduce moisture loss from mortar specimens during the early hardening period. |
| Zinc Phosphate content of paint | Vogel | This test method covers laboratory determination of Zinc phosphate content of paint |
