TIG Welding Like a Pro

Robert Hernandez

Updated April 08, 2026 19:11

TIG Welding

Clean Setup = Clean Welds

The Problem

If your welds look dirty, weak, or inconsistent, it is usually not your machine.

It is contamination.

TIG welding is precise. Even small mistakes show up fast.

The Straight Answer

Clean everything.

Clean metal
Clean filler
Clean gas
Clean setup

That is how you get clean welds.

Step 1 — Start With Clean Material

A quality weld starts before you strike an arc.

Your joint needs to be:

Smooth
Clean
Completely free of contamination

Remove anything that does not belong:

Mill scale
Dirt and dust
Grease and oil
Moisture

If it is on the metal, it is going in your weld.

Step 2 — Use the Right Tools (Do Not Mix Them)

This is where a lot of welders slip up.

One brush per material. No exceptions.

Stainless → stainless-only brush
Aluminum → aluminum-only brush
Titanium → dedicated tools
Carbon steel → separate tools

Mixing tools causes cross contamination.
Cross contamination leads to failed welds.

Step 3 — Clean It the Right Way

After grinding or cutting:

Remove slag and residue
Wipe everything down

Many shops use acetone, but there is a better option.

Arc-Zone Tip:
Use EZ Wipes™ (lint-free, pre-saturated wipes)

One side removes contaminants
One side finishes clean
No lint and no residue
No acetone needed

Never use chlorine-based cleaners.

Step 4 — Keep It Clean Until You Weld

Cleaning once is not enough.

If you are not welding right away:

Cover the joint with paper or plastic
Keep dust and moisture off

Recontamination happens fast.

Step 5 — Protect the Weld From Oxygen

Oxygen is one of the biggest reasons welds fail.

You need to protect:

The weld puddle
The heat-affected zone (HAZ)
Sometimes the root side

Step 6 — Set Your Gas Up Right

Argon is your primary shielding gas.

In some cases, such as aluminum welding, helium can be added for more heat.

Check your system:

Gas lines
Fittings
O-rings
Torch seals

Use a simple soap and water test to check for leaks.
If bubbles grow, you have a leak.

More gas does not mean better welds.

Too much flow creates turbulence.
Turbulence pulls oxygen into the weld.

Set your flow correctly:

Test on scrap first
Adjust until coverage is stable

Step 7 — Improve Gas Coverage

Use a gas lens or flow straightener whenever possible.

Smoother gas flow
Better coverage
Less contamination

Step 8 — Check Your Torch Setup

Poor torch components lead to poor welds.

Inspect:

Cups
Insulators
Gaskets
O-rings

Make sure everything fits correctly, is in good condition, and is not worn out.

Always use quality parts from a trusted source.

Step 9 — Use the Right Tungsten

Your tungsten controls your arc.

2% thoriated (traditional)
2% ceriated (non-radioactive)
2% lanthanated (best all-around)

Shop Rule:
Dirty tungsten leads to an unstable arc.

Use high-quality electrodes
Grind on a dedicated tungsten grinder

Arc-Zone Recommendation

ArcTime™ tungsten delivers consistent arc starts, stable performance, and long electrode life across all materials.

TIG Welding Quick Setup Guide

← Swipe table to see more →

Material Thickness	Tungsten	Cup Size	Filler	Amps	Gas (CFH)
0.020–0.040"	0.020–0.040"	3–5	—	20–50	7–10
1/16"	1/16"	4–6	1/16"	80–100	10–20
3/32"	3/32"	6–8	3/32"	120–145	10–20
1/8"	3/32"	5–7	3/32"	140–160	10–20
3/16"	3/32"	7–10	1/8"	200–250	20
1/4"–3/8"	3/16"	8–12	3/16"	275–400	20
1/2"	3/16"	8–12	1/4"	275–500	20

These are starting points. Always test and fine-tune.

Shop Tip

Most TIG problems do not start at the weld. They start with prep, gas, or tungsten.

If you are:

Fighting arc starts
Seeing porosity
Reworking welds

Fix your setup first.

Bottom Line

TIG welding is not about tricks. It is about control.

Control comes from:

Clean materials
Clean tools
Proper gas coverage
The right tungsten

Get those right, and everything else gets easier.