How do you calculate wire consumption for arc spray?

Multiply the area to coat by the wire needed per unit area for the theoretical amount, then divide by deposit efficiency. For 500 area units at 0.08 wire units each and 85% efficiency: 500 x 0.08 / 0.85 = 47.06 units of wire to feed.

What deposit efficiency does twin-wire arc spray achieve?

Wire arc is one of the more efficient thermal spray processes, commonly 65-85% for zinc and aluminum and somewhat lower for high-melting cored wires. The 85% default sits at the top of that band for a well-set gun spraying a flat surface.

Why do I feed more wire than ends up on the part?

Atomized droplets overspray past the edges, rebound, and oxidize. In the example the coating needs 40 units on the part, but you feed 47.06 units, leaving 7.06 units lost to the process.

How do I cut wire consumption on a corrosion job?

Hold spray angle near 90 degrees, keep standoff consistent, tune atomizing air so droplets are fine but not over-oversprayed, and mask edges tightly so you are not spraying zinc or aluminum into open air.

Wire consumption vs. powder consumption, when does each apply?

Use wire consumption for twin-wire electric arc and combustion wire flamespray; use powder consumption for plasma, HVOF, HVAF, and cold spray. The math is identical, but the efficiency and feedstock cost differ substantially.

Does this give wire length or wire mass?

It returns whatever unit you feed it. If your wire-per-unit-area figure is in kilograms it returns mass; if it is in meters of wire it returns length. Keep the unit consistent between the input and the spool you are ordering.

Thermal Spray, Hardfacing & Wear Coatings calculator

Wire Consumption Calculator

Wire consumption tells a thermal spray shop how much solid or cored wire it must feed to build a coating over a given area on twin-wire arc or combustion wire (flamespray) equipment. Estimators and spray operators use it to spool the right amount of zinc, aluminum, 420 stainless, or a cored hardfacing wire and to cost anti-corrosion and wear jobs accurately. Wire arc is prized for its high deposit rate and low cost per kilogram, so getting the consumption right is what keeps a competitive quote profitable. The calculator separates the wire that actually bonds to the part from the extra you must feed to cover deposit efficiency losses.

What this calculator does

Wire consumption tells a thermal spray shop how much solid or cored wire it must feed to build a coating over a given area on twin-wire arc or combustion wire (flamespray) equipment.
Use it when wire consumption in thermal spray, hardfacing and wear coatings needs a buy quantity for the next thermal spray, hardfacing and wear coatings run and you do not want to short the line.
It computes the total wire mass or length you must feed to coat a defined area, then splits out the theoretical on-part amount and the overspray loss allowance.

Formula used

Required wire consumption = covered amount × use per unit ÷ transfer efficiency
Loss allowance = required amount - theoretical amount

Inputs explained

Total surface area to coat:
Wire needed per unit area (as-deposited):
Deposit (transfer) efficiency:

How to use the result

Use it when quoting an arc-spray or flamespray job, ordering wire, or checking spool draw against a completed work order.
Transfer efficiency for wire processes shifts with atomizing air pressure, arc current, and spray distance, so a single stored figure will not fit every part; verify against your own arc-spray logs.

Current U.S. benchmarks

Industrial electricity averages 8.66 cents per kWh across the U.S. (EIA, Apr 2026), up 5.5% from a year earlier. Energy-intensive steps carry this directly into unit cost.
The producer price index for industrial chemicals stands at 344.336 (BLS, May 2026), up 16.1% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,543 chemical manufacturing establishments employing about 911,245 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate wire consumption for arc spray? Multiply the area to coat by the wire needed per unit area for the theoretical amount, then divide by deposit efficiency. For 500 area units at 0.08 wire units each and 85% efficiency: 500 x 0.08 / 0.85 = 47.06 units of wire to feed.
What deposit efficiency does twin-wire arc spray achieve? Wire arc is one of the more efficient thermal spray processes, commonly 65-85% for zinc and aluminum and somewhat lower for high-melting cored wires. The 85% default sits at the top of that band for a well-set gun spraying a flat surface.
Why do I feed more wire than ends up on the part? Atomized droplets overspray past the edges, rebound, and oxidize. In the example the coating needs 40 units on the part, but you feed 47.06 units, leaving 7.06 units lost to the process.
How do I cut wire consumption on a corrosion job? Hold spray angle near 90 degrees, keep standoff consistent, tune atomizing air so droplets are fine but not over-oversprayed, and mask edges tightly so you are not spraying zinc or aluminum into open air.
Wire consumption vs. powder consumption, when does each apply? Use wire consumption for twin-wire electric arc and combustion wire flamespray; use powder consumption for plasma, HVOF, HVAF, and cold spray. The math is identical, but the efficiency and feedstock cost differ substantially.

Last reviewed 2026-05-12.