What is ISO 2040:1972 Strontium chromate pigments for paints?
ISO 2040:1972 is a standard that specifies the requirements and test methods for strontium chromate pigments for paints. Strontium chromate is a yellow pigment that is commonly used in paints and coatings, particularly in aerospace applications, due to its excellent corrosion resistance properties.
The standard covers the following aspects of strontium chromate pigments for paints:Requirements for composition and properties of strontium chromate pigments, including particle size, tinting strength, and chemical composition.
Test methods for determining the physical and chemical properties of strontium chromate pigments, including particle size distribution, tinting strength, moisture content, and solubility.
Packaging and labelling requirements for strontium chromate pigments.
ISO 2040 provides a basis for quality control and specification of strontium chromate pigments for use in paints and coatings. By specifying the requirements and test methods for these pigments, the standard helps ensure that the resulting paints and coatings have the desired properties and performance characteristics, particularly with respect to corrosion resistance.
Requirements of ISO 2040:1972
ISO 2040:1972 specifies the following requirements for strontium chromate pigments for paints:
Chemical composition: The strontium chromate pigment shall consist of at least 97% by weight of strontium chromate (SrCrO4).
Particle size distribution: The pigment shall have a maximum particle size of 10 microns and a minimum particle size of 0.5 microns.
Tinting strength: The tinting strength of the pigment shall be at least 95% of that of a standard sample of strontium chromate.
Moisture content: The moisture content of the pigment shall not exceed 0.5% by weight.
Solubility: The pigment shall be insoluble in water, dilute acids, and dilute alkalis.
Other impurities: The pigment shall not contain any significant amounts of other impurities, such as lead or calcium compounds, that could adversely affect its performance in paints and coatings.
ISO 2040 also specifies test methods for determining compliance with these requirements, including methods for measuring particle size distribution, tinting strength, moisture content, and solubility.
Overall, ISO 2040 specifies the chemical composition, particle size distribution, tinting strength, moisture content, solubility, and other impurity limits for strontium chromate pigments for use in paints and coatings, and provides test methods for verifying compliance with these requirements.
Benefits of this standard
The benefits of ISO 2040:1972 for strontium chromate pigments for paints are:
Quality control: The standard specifies the requirements and test methods for strontium chromate pigments. Providing a basis for quality control and ensuring that the pigments used in paints and coatings meet the desired performance characteristics.
Improved product performance: Strontium chromate pigments are known for their excellent corrosion resistance properties. By specifying the requirements and test methods for these pigments, ISO 2040:1972 helps ensure that the resulting paints and coatings have the desired corrosion resistance properties.
Compatibility: The standard helps ensure that the strontium chromate pigments are compatible with other components in the paint or coating formulation. Reducing the risk of issues such as pigment settling or color changes.
Safety: The standard helps ensure that the strontium chromate pigments used in paints and coatings are free from significant amounts of impurities, such as lead or calcium compounds, which could pose health and safety risks.
International recognition: ISO 2040 is recognized internationally and can be used to ensure consistency and quality of strontium chromate pigments used in paints and coatings across different regions and countries.
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