Primary Zinc Matrix: Grain Size ASTM 5-7, Density 6.6-7.0 g/cm³

Component Specifications

Definition

The primary zinc matrix refers to the continuous zinc-dominated metallic phase that forms the structural backbone of zinc-aluminum master alloys. This matrix typically contains 85-95% zinc by weight and serves as the host for aluminum and other alloying elements. In industrial-grade high-purity zinc-aluminum master alloys, this matrix is engineered to maintain consistent crystalline structure, uniform elemental distribution, and predictable solidification behavior during casting processes. The matrix composition directly influences mechanical properties, corrosion resistance, and processing characteristics of the final alloy product.

Working Principle

The primary zinc matrix operates on metallurgical principles where zinc forms the continuous phase that dissolves and distributes aluminum atoms within its crystalline lattice. During solidification, zinc crystallizes first, creating a dendritic structure that controls grain size and prevents segregation. The matrix provides sacrificial corrosion protection through galvanic action while maintaining dimensional stability through controlled thermal expansion coefficients. Its electrochemical properties enable uniform current distribution in plating applications.

Materials

High-purity zinc (Zn ≥ 99.995%), Aluminum (Al 4-10%), Trace elements: Lead (Pb ≤ 0.003%), Cadmium (Cd ≤ 0.002%), Iron (Fe ≤ 0.002%), Copper (Cu ≤ 0.001%)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Density	6.6-7.0 g/cm³
Hardness	40-60 HB
Elongation	10-25%
Grain Size	ASTM 5-7
Zinc Content	85-95%
Melting Point	419-450°C
Aluminum Content	4-10%
Tensile Strength	120-180 MPa
Thermal Conductivity	110-125 W/m·K
Electrical Conductivity	28-32% IACS

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 301, ISO 752, ASTM B240, DIN 1743, EN 1774

Parent Products

This component is used in the following industrial products

Industrial-Grade High-Purity Zinc-Aluminum Master Alloy

Pre-alloyed zinc-aluminum base material for precise non-ferrous metal production

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Engineering Analysis

Risks & Mitigation

Zinc vapor formation above 500°C
Intergranular corrosion in chloride environments
Dimensional instability during thermal cycling
Aluminum segregation during improper solidification

FMEA Triads

Trigger: Inadequate temperature control during melting
Failure: Zinc vaporization and composition deviation
Mitigation: Implement precise temperature monitoring with ±5°C control and use protective atmosphere during processing

Trigger: Impurity contamination from raw materials
Failure: Reduced corrosion resistance and mechanical properties
Mitigation: Enforce strict material certification and implement spectroscopic analysis for each batch

Trigger: Rapid cooling during solidification
Failure: Microporosity and shrinkage defects in matrix
Mitigation: Control cooling rate at 10-20°C/minute and use directional solidification techniques

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Chemical composition: ±0.5% for major elements, ±0.05% for trace elements; Dimensional: ±1.5% of specified values

Test Method

Spectrochemical analysis (ASTM E1479), Metallographic examination (ASTM E3), Corrosion testing (ASTM G31), Mechanical testing (ASTM E8/E21)

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

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Manufacturers of Primary Zinc Matrix

Manufacturer profiles associated with Primary Zinc Matrix.

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Frequently Asked Questions

What is the primary function of the zinc matrix in zinc-aluminum alloys?

The primary zinc matrix serves as the structural foundation that provides dimensional stability, controls solidification behavior, and enables sacrificial corrosion protection through its electrochemical properties.

How does zinc purity affect matrix performance?

High-purity zinc (≥99.995%) ensures minimal impurity interference, resulting in consistent crystalline structure, predictable mechanical properties, and enhanced corrosion resistance in the final alloy product.

What industries commonly use zinc-aluminum master alloys with primary zinc matrix?

Automotive manufacturing (die-cast components), construction (galvanized steel), electrical equipment (conductive parts), and general metal fabrication industries utilize these alloys for corrosion resistance and structural applications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Primary Zinc Matrix