Description

Zinc Chromate is an inorganic compound primarily recognized for its role as a high-performance corrosion-inhibiting pigment. This compound matters for its ability to form a protective layer on metal substrates, significantly extending the service life of coated components in harsh environments. It is a critical raw material for manufacturers in the protective coatings, aerospace, and automotive primer industries, where long-term asset protection is paramount.

Application

• Corrosion-Inhibiting Primers: A key component in zinc chromate primers for steel, aluminum, and other metal alloys in aerospace and military applications.
• Industrial Maintenance Coatings: Used in heavy-duty protective paints for bridges, marine structures, and industrial equipment exposed to corrosive atmospheres.
• Automotive Underbody Coatings: Formulated into coatings that protect vehicle chassis and components from road salt and moisture.
• Pigment for Plastics and Ceramics: Imparts a characteristic yellow color and can provide some stabilization in specific polymer and ceramic matrices.
• Wood Treatment Preservatives: Historically used in certain wood preservative formulations, though this application is now highly restricted.
• Research & Development: Serves as a starting material or catalyst in various chemical synthesis and material science research projects.

Basic Information

Product Name	Zinc Chromate
CAS No.	13530-65-9
Molecular Formula	ZnCrO₄ (commonly represented, actual composition may vary)
Molecular Weight	Approx. 181.37 g/mol (for ZnCrO₄)
Synonyms	Zinc Yellow; Buttercup Yellow; Zinc Chromate Yellow; Chromic Acid, Zinc Salt; CI Pigment Yellow 36; Zinc Chromate(VI); Zinc Tetraoxochromate
EINECS	236-878-9

Quality Control

Our Zinc Chromate is manufactured under strict process controls to ensure batch-to-batch consistency and performance reliability. Quality is verified against stringent in-house specifications that assess key parameters such as chromate content, heavy metal impurities, and pigmentary properties. While this is an industrial-grade product, we adhere to relevant ISO 9001 quality management principles. A comprehensive Certificate of Analysis (COA) detailing assay, impurity levels, and physical characteristics is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent caking and degradation. Keep away from incompatible materials such as strong reducing agents.

Specification

Item	Specification
Appearance	Yellow Powder
Identification (IR)	Conforms
Assay (as ZnCrO₄)	Min. 95.0%
Chromium Content (as CrO₃)	Contact for details
Zinc Content	Contact for details
Moisture Content	Max. 1.0%
Water Soluble Matter	Max. 1.0%
Lead (Pb)	Max. 20 ppm
Sieve Residue (325 mesh)	Max. 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.