Ultra-Blak Rectifier - Liquid Additive for Black Oxide Chemicals

Subtotal $71.57
In stock
Only %1 left

Ultra-Blak Rectifier is used to control the buildup of sludge, red iron oxide, zinc, aluminum, and copper in Ultra-Blak 400 or other black-oxide solutions.

Samples available to purchase - CALL #262-786-9330.

PLEASE NOTE: Orders ship within 3 business days.

Health Hazard
Health Hazard
Irritant
Irritant

How to Use Ultra-Blak Rectifier

Adding Ultra-Blak Rectifier to a black-oxide bath forces iron sludge or buildup to float to the top, making it easy to skim from the surface and remove the contaminants.

Use Ultra-Blak Rectifier to:
  • Control the buildup of iron sludge and contaminants in black-oxide baths
  • Decontaminate black-oxide baths in 10–15 minutes
  • Avoid undesirable copper deposits and iron films
  • Achieve purer, more beautiful black finishes

How to Use Ultra-Blak Rectifier

Adding Ultra-Blak Rectifier to a black-oxide bath forces iron sludge or buildup to float to the top, making it easy to skim from the surface and remove the contaminants.

Use Ultra-Blak Rectifier to:
  • Control the buildup of iron sludge and contaminants in black-oxide baths
  • Decontaminate black-oxide baths in 10–15 minutes
  • Avoid undesirable copper deposits and iron films
  • Achieve purer, more beautiful black finishes
  • Customer Questions
  • Product Attachments
Are there distributors of EPi products near my location?
Please call EPi at 262-786-9330 or email: us-sales@epi.com.
When will my order ship?
Please see each individual product page for more information on the availability of each item. We try to process and ship non-sample orders in 3 business days. Samples and Trial Kits have a 5 business day lead time to process and ship. Also, after...
How do I track my order?
Click the "Login" link at the top right-hand side of our site to track your order. If you do not have an account with us just give us a call at 262-786-9330.
How do I return a product?
Please call us at 262-786-9330 or email: us-sales@epi.com.
How do I create an account?
Click the "Login" link at the top right-hand side of site.
What is black oxide?
Black oxide is a blend of caustic, oxidizers, and additives that is used on ferrous metals. There are three types of metal blackening: hot, mid, and room temperature blackening. EPi was the first company to offer all three processes. <...
What makes EPI’s black oxide and metal-blackening processes better?
Insta-Blak processes do not produce smutty rub-offs like other room-temperature products. Our Ultra-Blak products are premium-grade black oxide, and Kool-Blak does not produce a smutty rub off like other mid-temperature processes. They are easy-...
What are the advantages of black oxide and metal blackening?
Ultra-Blak:
  • Produces true black oxide finish Fe3O4 magnetite finish
  • Abrasion resistance
  • Corrosion protection
  • Meets military spec MIL-DTL-13924D and AMS 2485H
  • Blackens faster than other...
What can black oxide be used for?
Black oxide can be used on a wide variety of metals. Examples of specific products that can be blackened with black oxide are listed below. 
  • Locks
  • Automobile and motorcycle parts
  • Machine parts
  • Power ...
Who uses black oxide?
Large companies such as lock manufacturers or auto manufacturers use black oxide on a large-scale basis to blacken metal parts. Black oxide can also be used by the home hobbyist who would prefer to blacken just a few items. Below are some of the major...
How is black oxide applied?
Hot- and mid-temperature black oxide is applied through a seven-step process.
  1. Clean and degrease metal parts
  2. Rinse metal parts
  3. Hydrochloric acid
  4. Rinse metal parts
  5. Blacken parts in boiling solution (hot...
What types of metal can you blacken with hot or room-temperature black oxide ?
  • Steel
  • Stainless steel
  • Cast iron
  • Copper
  • Brass
  • Cadmium
  • Zinc
  • Nickel
  • Electroless nickel
How to prevent blackened parts from getting rusty?
Customers reach out to us asking how to prevent their freshly blackened parts from rusting. EPi recommends: Use running water to rinse the parts for 1-2 minutes; Do not dry the parts between prepping, cleaning, and blackening...

More Information

More Information
Best Seller No
Blackening Features Magnetite
Hazardous Material No
Industrial Use Only No
Replacement For / Same As Du-Lite Black Bath Purifier Compound

FAQ (13)

Customer Questions
Are there distributors of EPi products near my location?
Please call EPi at 262-786-9330 or email: us-sales@epi.com.
When will my order ship?
Please see each individual product page for more information on the availability of each item. We try to process and ship non-sample orders in 3 business days. Samples and Trial Kits have a 5 business day lead time to process and ship. Also, after...
How do I track my order?
Click the "Login" link at the top right-hand side of our site to track your order. If you do not have an account with us just give us a call at 262-786-9330.
How do I return a product?
Please call us at 262-786-9330 or email: us-sales@epi.com.
How do I create an account?
Click the "Login" link at the top right-hand side of site.
What is black oxide?
Black oxide is a blend of caustic, oxidizers, and additives that is used on ferrous metals. There are three types of metal blackening: hot, mid, and room temperature blackening. EPi was the first company to offer all three processes. <...
What makes EPI’s black oxide and metal-blackening processes better?
Insta-Blak processes do not produce smutty rub-offs like other room-temperature products. Our Ultra-Blak products are premium-grade black oxide, and Kool-Blak does not produce a smutty rub off like other mid-temperature processes. They are easy-...
What are the advantages of black oxide and metal blackening?
Ultra-Blak:
  • Produces true black oxide finish Fe3O4 magnetite finish
  • Abrasion resistance
  • Corrosion protection
  • Meets military spec MIL-DTL-13924D and AMS 2485H
  • Blackens faster than other...
What can black oxide be used for?
Black oxide can be used on a wide variety of metals. Examples of specific products that can be blackened with black oxide are listed below. 
  • Locks
  • Automobile and motorcycle parts
  • Machine parts
  • Power ...
Who uses black oxide?
Large companies such as lock manufacturers or auto manufacturers use black oxide on a large-scale basis to blacken metal parts. Black oxide can also be used by the home hobbyist who would prefer to blacken just a few items. Below are some of the major...
How is black oxide applied?
Hot- and mid-temperature black oxide is applied through a seven-step process.
  1. Clean and degrease metal parts
  2. Rinse metal parts
  3. Hydrochloric acid
  4. Rinse metal parts
  5. Blacken parts in boiling solution (hot...
What types of metal can you blacken with hot or room-temperature black oxide ?
  • Steel
  • Stainless steel
  • Cast iron
  • Copper
  • Brass
  • Cadmium
  • Zinc
  • Nickel
  • Electroless nickel
How to prevent blackened parts from getting rusty?
Customers reach out to us asking how to prevent their freshly blackened parts from rusting. EPi recommends: Use running water to rinse the parts for 1-2 minutes; Do not dry the parts between prepping, cleaning, and blackening...
Please, mind that only logged in users can submit questions