Torchlight Infinite Corrosion Guide: Materials, Effects, Costs, Odds, and Best Strategies

Corrosion is a high-risk equipment upgrade system in Torchlight: Infinite. It can improve powerful gear affixes, introduce special Aember Base Affixes, or transform equipment into its Corroded version. However, an unfavorable result can permanently reduce an item’s usefulness or prevent it from being traded.

In the SS14 Tartarus season, Corrosion remains an important part of endgame equipment optimization. Players can use different materials depending on whether they are upgrading Legendary, non-Legendary, or Vorax gear.

This guide explains how Corrosion works, where to get Corrosion materials, the differences between Darkness and Darkest Corrosion, possible outcomes, success probabilities, and how to avoid wasting valuable equipment.

What Is Corrosion in Torchlight Infinite?

Corrosion is a special equipment modification mechanic that applies a randomly selected effect to eligible gear. Depending on the outcome, Corrosion may improve an affix’s tier, reroll existing affix values, replace Base Affixes, or simply change the item’s status to Corroded.

Unlike ordinary crafting, Corrosion involves considerable uncertainty. You cannot freely choose which result your equipment receives.

Important Corrosion rules:

• Corrosion becomes available after progressing through the main storyline.
• Players can perform Corrosion through Zenoth the Lightless in town.
• Corrosion requires different materials depending on the item category and Corrosion type.
• Most equipment can undergo Corrosion only once.
• Corroded equipment generally cannot undergo normal crafting again.
• Some Corrosion results bind equipment, preventing subsequent trading.
• Special Legendary equipment may have unique Corrosion interactions and exceptions.

Because these changes can be permanent, players should generally finish ordinary equipment crafting before attempting Corrosion.

How to Unlock and Use Corrosion

Follow these steps to apply Corrosion to your equipment:

1. Progress through the campaign: Continue the main story until the Corrosion system becomes available.
2. Visit Zenoth: Find Zenoth the Lightless in town and open the Corrosion interface.
3. Select your equipment: Choose an eligible Legendary, non-Legendary, or specialized item.
4. Choose a Corrosion type: Select an available option, such as Darkness Corrosion or Darkest Corrosion.
5. Check the required materials: The game displays the applicable material requirements.
6. Review the possible outcomes: Pay particular attention to binding, affix changes, and item-specific effects.
7. Confirm Corrosion: Consume the required materials and receive a random Corrosion result.
8. Inspect the finished item: Review its new affixes, Corroded status, and trading restrictions.

Tip: Never Corrode valuable equipment without first checking whether the potential upgrade justifies the risk of losing its existing desirable properties.

All Corrosion Effects Explained

Standard Corrosion has five principal outcomes: Mutation, Chaos, Desecration, Arrogance, and Void. Not every outcome is available through every Corrosion type.

Version note: Current SS14 database entries describe standard Arrogance and Desecration as upgrading one and two affixes respectively by one tier. Older game help describes possible upgrades of one or two tiers. Always check the current in-game description and any special item modifiers before attempting Corrosion.

1. Mutation Corrosion

Mutation modifies the Base Affixes of equipment by introducing an Aember Base Affix.

Aember Base Affixes are special properties available through the Corrosion system. They can provide unusual bonuses not available from ordinary affix crafting.

Examples of documented Aember Base Affixes include:

• Additional maximum Tenacity Blessing stacks.
• Additional maximum Agility Blessing stacks.
• Additional maximum Focus Blessing stacks.
• Special support effects for Main Skills.
• Curse-triggering properties on eligible accessories.
• Additional maximum elemental resistance on suitable equipment.

The available Aember affixes depend on the equipment category.

When is Mutation useful? Mutation can be worthwhile when the resulting Aember Base Affix has exceptional synergy with your build. However, it is risky on equipment whose existing Base Affixes are already valuable.

2. Chaos Corrosion

Chaos rerolls the values of existing prefixes and suffixes without upgrading their tiers.

For example, if an item has an important damage-related affix with a relatively low numerical roll, Chaos may produce a better value. However, it may also produce a worse roll or reduce the usefulness of other affixes.

Chaos is generally less desirable than a successful tier upgrade, particularly on carefully optimized equipment.

It also normally makes the item bound.

3. Desecration Corrosion

Desecration is exclusive to Darkest Corrosion under the standard Corrosion system.

It upgrades two eligible prefixes or suffixes, making it especially attractive for equipment with multiple important high-tier affixes.

For non-Legendary equipment, Corrosion upgrades can potentially transform T0 affixes into the more powerful T0+ tier.

Example: If a high-end item contains two valuable T0 affixes, a favorable Desecration result may improve their tiers and significantly increase the item’s performance.

However, the affected affixes are not guaranteed to be the exact ones you want.

4. Arrogance Corrosion

Arrogance upgrades one eligible prefix or suffix and can be an excellent result when the item already has a desirable combination of affixes.

For non-Legendary gear, the upgraded affix can potentially reach T0+, subject to the relevant rules.

Because Arrogance normally does not bind the equipment, a successful result can also preserve its potential trading value.

5. Void Corrosion

Void changes equipment into the Corroded state without providing a normal affix-tier upgrade.

For an ordinary item, this is usually an unfavorable outcome because it consumes the Corrosion opportunity and may bind the equipment.

However, certain Legendary items have special Corroded versions or interactions. Therefore, the usefulness of a Void result depends on the specific equipment.

Darkness Corrosion vs. Darkest Corrosion

Darkness Corrosion and Darkest Corrosion are the two main forms of standard equipment Corrosion.

Which is better? Darkest Corrosion generally offers greater potential for upgrading high-end gear because it can produce Desecration. Darkness Corrosion may be more economical when the additional potential of Darkest Corrosion does not justify its material cost.

Corrosion Materials: How to Get Them

As of SS14, Corrosion uses several materials rather than only Aemberon Cores and Familiar Nexuses.

How to Get Aemberon Cores

Aemberon Cores are associated with Dark Surge gameplay and are used to perform Darkness Corrosion on Legendary equipment.

Dark Surge originated as a seasonal mechanic involving infected monsters, Corrosion energy, and special encounters.

Players seeking Aemberon Cores should prioritize the relevant Dark Surge content when it is available and check the Trade House for alternative acquisition options where permitted.

How to Get Familiar Nexus

Familiar Nexus is required for Darkest Corrosion on Legendary equipment.

According to the SS14 item database, it has a chance to drop after defeating Tidemasters at any difficulty level in Void Rift.

Because the drop is chance-based, players should not expect every boss encounter to reward a Familiar Nexus.

Darkest Corrosion can be expensive, so consider whether trading the material would be more valuable than using it on your current equipment.

How to Get Corrupted Axis and Glorious Axis

Corrupted Axis and Glorious Axis are associated with Clockwork Ballet gameplay.

These materials are important for non-Legendary equipment:

• Corrupted Axis: Used for Darkness Corrosion.
• Glorious Axis: Used for Darkest Corrosion.

Both materials remain listed in the SS14 database. Their appearance in earlier Clockwork Ballet content does not mean they are exclusive to the original season in which that gameplay was introduced.

How to Get Mutagenic Slurry

Mutagenic Slurry is required for Vorax Corrosion.

The SS14 database identifies the Rainbow Antidote Vial, obtained after completing the Vorax endgame battle, as a possible source.

Because this is a specialized material, it is only relevant when upgrading eligible Vorax gear.

Corrosion Costs by Item Level

The cost of Corrosion depends on the type of equipment, the Corrosion option, and the relevant material requirements.

Older versions of Torchlight Infinite documented the following Aemberon Core costs for Darkness Corrosion:

Important: This is a historical cost reference, not a newly verified SS14 price table. The current exact material requirements have not been independently confirmed across every item category. Use the cost displayed by the Corrosion interface as the authoritative requirement before committing materials.

Older Darkest Corrosion references listed one Familiar Nexus per attempt regardless of item level. More recent community guides also describe a single-material requirement for Darkest Corrosion. Nevertheless, players should check the current in-game requirement rather than relying exclusively on historical tables.

Corrosion Success Rates and Probabilities

Corrosion outcomes are randomized, and understanding the potential results is important for evaluating risk.

Community guides published in 2025 reported the following probability distributions for standard Darkness and Darkest Corrosion.

Accuracy note: These are historical community-reported probabilities, not official SS14 drop-rate confirmations. Updated seasonal mechanics, item-specific exceptions, and special equipment may affect the actual available outcomes. The numbers should not be treated as guaranteed current rates.

What Is the Chance of a Successful Corrosion?

Under the historical community-reported distributions:

• Darkness Corrosion: Arrogance accounts for 30% of outcomes.
• Darkest Corrosion: Arrogance and Desecration each account for 15%, for a combined 30% chance of obtaining an affix-tier upgrade.

However, an affix-tier upgrade is not automatically a successful result for every build. The upgraded affix must actually be useful.

Likewise, Mutation and Chaos should not always be considered failures. A desirable Aember Base Affix or improved numerical roll can sometimes be valuable.

For this reason, the common community description of a “70% brick chance” is only a simplified way of categorizing outcomes rather than a universal measure of whether an item gains or loses value.

What Happens When Gear Becomes Bound?

Binding is one of the most important considerations when using Corrosion.

Under the standard rules, an item that receives a result other than Arrogance or Desecration normally becomes bound.

Bound equipment cannot be traded normally, so a powerful item may lose its resale potential even if its combat performance remains useful.

Exception: Certain special Legendary items, including First Aember, explicitly modify normal binding behavior.

If you plan to sell expensive equipment, consider its market value before attempting Corrosion.

Can You Craft Corroded Gear Again?

Generally, no. Under the newer equipment rules, Corroded gear cannot undergo ordinary crafting or standard repeat Corrosion.

Older descriptions stated that Corroded Rare gear could be crafted further at twice the normal material cost. That information belongs to an earlier version of the crafting system and should not be used as general guidance for SS14.

Plan to complete ordinary affix crafting and other applicable preparations before using Corrosion.

Some specialized equipment systems may have separate interactions with Corroded gear, and certain unique items explicitly bypass the standard one-time restriction.

Vorax Corrosion Guide

Vorax Corrosion is a specialized type of Corrosion for Vorax gear.

Instead of using Aemberon Cores, Familiar Nexuses, or Axis materials, it uses Mutagenic Slurry.

Vorax Corrosion has five distinctive outcomes.

Which Vorax Corrosion Result Is Best?

The best outcome depends on how the useful affixes are distributed across the item.

• Metamorphosized: Particularly desirable when most important affixes are prefixes.
• Derived: Particularly desirable when the item’s strongest properties are suffixes.
• Limb-Stitched: Can be valuable when two separate affixes offer meaningful improvements.
• Hyperplastic: Can improve an important single affix.
• Festered: Generally the least desirable outcome for ordinary optimization.

Before attempting Vorax Corrosion, inspect whether the most important modifiers on your equipment are prefixes or suffixes.

SS14 Update: First Aember and Special Corrosion Rules

One of the most important Corrosion-related additions in the SS14 Tartarus season is First Aember, a special pair of Legendary gloves.

Unlike ordinary gear, First Aember has properties that directly modify the Corrosion system.

First Aember: Normal Version

• Can undergo Darkest Corrosion even when already Corroded.
• Mutation preserves existing Base Affixes and adds one Aember Base Affix, up to a maximum of four.
• Chaos randomly removes one affix, but does not bind the gloves.
• Desecration replaces the gloves with a random pair of Matchless Legendary Gloves.
• Arrogance upgrades one prefix or suffix by one tier.
• Void does not bind the gloves.

Corroded First Aember: Enhanced Effects

The Corroded version has stronger or modified Corrosion interactions.

The maximum of four added Aember Base Affixes also applies to the enhanced Mutation effect.

Important: First Aember is an exception to the general rule that Corroded equipment cannot be Corroded again. Its unusual mechanics do not apply to every Legendary item.

How to Get First Aember

First Aember is a Matchless Legendary item associated with SS14’s Caged Beast gameplay.

According to the SS14 equipment database, it is an exclusive drop from Caged Beast encounters at Profound Timemark 8 or higher.

Players interested in repeated Darkest Corrosion or building unusual Aember affix combinations should investigate this equipment, while keeping in mind the considerable risks of Chaos and Desecration results.

Best Corrosion Strategy for Endgame Gear

Corrosion can create exceptionally powerful equipment, but it is rarely sensible to use expensive materials on every item you find.

1. Complete Normal Crafting First

Make sure your desired ordinary affixes are in place before attempting Corrosion.

Because the Corroded state normally prevents further standard crafting, unfinished equipment may lose its upgrade potential permanently.

2. Focus on Valuable Affix Tiers

Arrogance and Desecration are especially desirable when your equipment already contains important high-tier affixes.

On suitable non-Legendary gear, upgrading T0 affixes into T0+ can deliver substantial improvements.

However, an upgrade to an unimportant affix may provide little actual benefit.

3. Choose Materials Based on Item Value

Darkest Corrosion is usually best reserved for items whose potential gains justify the additional material investment.

For lower-value equipment, consider whether Darkness Corrosion is sufficient or whether it would be better to sell the item without attempting Corrosion.

4. Consider Trading Restrictions

If an item is primarily valuable as a Trade House investment, binding can be a significant disadvantage.

Evaluate the potential selling price of both Corroded and uncorroded versions before using valuable materials.

5. Understand the Actual Risk

A successful Corrosion animation or upgraded affix does not necessarily mean your item has become better for your build.

Check whether the result improves meaningful statistics such as damage, survivability, skill levels, movement speed, or another build-specific mechanic.

6. Avoid Corroding Equipment You Cannot Replace

When an item is essential to your character’s current progression, consider keeping it unchanged until you have acquired a replacement.

One practical strategy is to use a spare copy for high-risk Corrosion attempts while retaining the original equipment.

Common Corrosion Mistakes to Avoid

• Corroding unfinished gear: Ordinary crafting is generally unavailable afterward.
• Assuming Corrosion always improves equipment: Several outcomes may be unfavorable.
• Ignoring binding: Many results prevent further trading.
• Using the wrong material: Legendary, non-Legendary, and Vorax equipment use different materials.
• Expecting Desecration from Darkness Corrosion: This outcome belongs to Darkest Corrosion.
• Assuming percentages are guaranteed: Older community probability tables may not reflect every current or special-item interaction.
• Ignoring special Legendary rules: First Aember demonstrates that some equipment has unique Corrosion mechanics.
• Confusing Corrosion with Erosion damage: Gear Corrosion is an equipment system, not an Erosion damage effect or Wilt mechanic.

Torchlight Infinite Corrosion FAQ

How do you unlock Corrosion in Torchlight Infinite?

Corrosion becomes available through main-story progression. Once unlocked, you can access the mechanic through Zenoth the Lightless in town.

Where is the Corrosion NPC?

Zenoth the Lightless is the NPC associated with the Corrosion system. Visit Zenoth in town after unlocking the feature.

What is the difference between Darkness and Darkest Corrosion?

Darkness Corrosion offers Mutation, Chaos, Arrogance, and Void. Darkest Corrosion adds Desecration, which can upgrade two affixes instead of one.

Can Legendary gear be Corroded?

Yes. Legendary gear uses Aemberon Cores for Darkness Corrosion and Familiar Nexuses for Darkest Corrosion. Individual Legendary items may have additional rules or special Corroded effects.

Can Rare gear be Corroded?

Eligible non-Legendary equipment can undergo Corrosion using Corrupted Axis or Glorious Axis. Check the in-game interface for the eligibility requirements of your specific item.

Can you Corrode an item more than once?

Generally, no. Most items can only be Corroded once. However, special equipment such as the SS14 First Aember gloves explicitly allows additional Darkest Corrosion even after becoming Corroded.

What is T0+ Corrosion?

T0+ is a powerful affix tier that eligible non-Legendary gear can reach through favorable Corrosion upgrades. It goes beyond the normal T0 tier and can be especially valuable for endgame builds.

Does Corrosion make equipment bound?

Often, yes. Under standard rules, Mutation, Chaos, and Void normally bind equipment, while Arrogance and Desecration normally do not. Special item properties can create exceptions.

Can you remove Corrosion from gear?

There is no standard method for simply removing the Corroded status and restoring the item to its previous condition. Treat Corrosion as an irreversible upgrade decision.

Can you craft equipment after Corrosion?

Ordinary crafting is generally unavailable on Corroded equipment. Complete normal crafting before applying Corrosion unless an explicitly supported special interaction applies.

Is Darkest Corrosion worth it?

Darkest Corrosion can be worthwhile on valuable equipment with multiple important affixes, particularly when Desecration could create a major upgrade. However, it is usually a poor investment on disposable or unfinished gear.

What is the best Corrosion outcome?

For standard high-end equipment, Desecration is often the most desirable outcome because it can upgrade two affixes. Arrogance is also valuable. For certain builds, Mutation may produce an exceptional Aember Base Affix.

How do you get Corrosion materials?

Aemberon Cores are associated with Dark Surge, Familiar Nexuses with Tidemasters, Corrupted Axis and Glorious Axis with Clockwork Ballet, and Mutagenic Slurry with Vorax endgame encounters.

Is gear Corrosion the same as Erosion damage?

No. Gear Corrosion is a crafting mechanic that changes equipment. Erosion is a damage type in Torchlight Infinite. They are separate gameplay systems.