1. What is Specific Gravity of Platinum Plated?

The specific gravity of platinum plated materials is a measure of density relative to water, calculated based on the densities of platinum and the base metal, and the thickness fraction of the plating.

2. How Does the Calculator Work?

The calculator uses the specific gravity formula:

Where:

• \( \rho_{platinum} \) — Density of platinum (kg/m³)
• \( \rho_{base} \) — Density of base metal (kg/m³)
• \( t \) — Thickness fraction of platinum plating (0 to 1)
• \( SG \) — Specific gravity (dimensionless)

Explanation: The equation calculates a weighted average of densities based on the thickness of the platinum plating.

3. Importance of Specific Gravity Calculation

Details: Calculating specific gravity is important for material identification, quality control, and determining the composition of plated materials.

4. Using the Calculator

Tips: Enter platinum density (default is 21450 kg/m³), base metal density, and thickness fraction (0-1). All values must be valid (densities > 0, thickness between 0-1).

5. Frequently Asked Questions (FAQ)

Q1: What is the density of pure platinum?
A: Pure platinum has a density of approximately 21450 kg/m³ (21.45 g/cm³).

Q2: How is thickness fraction determined?
A: Thickness fraction is the ratio of platinum plating thickness to total material thickness (typically measured in micrometers).

Q3: What are typical base metals used with platinum plating?
A: Common base metals include silver (10490 kg/m³), copper (8960 kg/m³), and nickel (8908 kg/m³).

Q4: How accurate is this calculation?
A: The calculation assumes uniform plating thickness and perfect adhesion. Actual measurements may vary slightly.

Q5: Can this be used for other plated metals?
A: Yes, the same formula works for any plated metal by substituting the appropriate densities.