Degreasing metal parts is a critical step in most manufacturing and maintenance workflows. However, while removing oils and residues, many conventional degreasers expose metal surfaces to oxygen and moisture, creating the perfect environment for flash rust. This form of immediate surface corrosion can occur within minutes of rinsing and can compromise part quality, downstream coatings, or storage readiness. Selecting the right flash rust inhibitor cleaner is essential to prevent this issue from the very start.
Manufacturers must rely on flash rust inhibitor cleaner technologies that both clean and protect, without adding extra steps or compromising process efficiency.
Why Flash Rust Happens After Cleaning
Flash rust is caused by the rapid oxidation of exposed metal surfaces immediately after contact with water or aqueous-based cleaning solutions. This is especially problematic in:
Carbon steel and ferrous alloys
High-humidity or poor-airflow environments
Heated wash systems without inhibitor additives
Applications requiring high cleanliness without protective coatings
Standard degreasers, while effective at removing oils and particulates, often lack corrosion protection. As a result, parts may leave the wash station clean but vulnerable, making flash rust a common and costly issue.
Add Flash Rust Prevention to Your Parts Washer
Flash rust can appear within minutes after cleaning if metal surfaces remain unprotected. Learn how ZERUST® AxxaWash™ cleaners add integrated flash rust inhibition to your parts washer system to protect freshly cleaned metal parts and maintain production quality.
The answer lies in selecting a cleaner with integrated corrosion inhibition, one that not only removes soils but also leaves behind a barrier to protect the surface from oxidation. This approach streamlines your process by combining cleaning and corrosion control in one step.
ZERUST® AxxaWash™: Cleaners & Degreasers with Rust Inhibitors
ZERUST® AxxaWash™ offers a proven line of aqueous-based flash rust inhibitor cleaners specifically engineered for industrial degreasing and short-term corrosion protection. These products are:
Low to very low foaming
Mildly alkaline or near-neutral pH
Ideal for multi-metal compatibility
Optimized for spray, immersion, and ultrasonic wash systems
Effective on light-to-medium hydrocarbon soils
Each solution is tailored to balance soil removal, surface protection, and process efficiency, making them ideal for manufacturers seeking consistent results without flash rust risk.
AxxaWash KF‑123 is a low‑foaming, mildly alkaline water-based industrial parts washer that removes light to medium hydrocarbon soils on ferrous substrates while offering built-in flash-rust inhibition. It is compatible with spray, ultrasonic, and immersion wash systems and remains low-foam even above 135 °F (57 °C). This cleaner avoids the use of phosphates, silicates, boron, or alkylphenol ethoxylates, making it safer and more environmentally friendly. After cleaning, KF‑123 can be rinsed off or left in place as a dry-in-place flash-rust inhibitor and can also prepare surfaces for long-term rust-preventive treatments like Axxanol™ or Axxatec™. Its formulation also helps mitigate chloride contamination.
A detailed close-up of steel parts cleaned with AxxaWash KF-124.
KF‑124 is a mildly alkaline, low-foaming water-based degreaser designed specifically to work under lower temperature ranges and still offer flash-rust protection. It effectively removes light to medium hydrocarbon soils, and is compatible with immersion, spray, and ultrasonic cleaning modes. The formula also includes chloride mitigation features to reduce the impact of ionic contaminants. Because it doesn’t contain harsh components like phosphates, silicates, boron, or alkylphenol ethoxylates, it aligns well with environmental and regulatory restrictions. After cleaning, the solution may be rinsed off or left as a dry-in-place protective layer.
Close-up of long steel rods cleaned with AxxaWash KMS-220 after fine CNC turning.
KMS‑220 is a low-foam, mildly alkaline cleaner that excels at oil-splitting, making it ideal for metal parts with mixed oils or emulsions. It also delivers flash-rust inhibition and is fully compatible with hard water. The effective temperature range is relatively low, making it suitable for processes where excessive heat is undesirable. KMS‑220 is especially good for general cleaning across ferrous and non‑ferrous parts in spray or similar systems (though caution is advised for immersion use in some cases).
AxxaWash NW-10C prevents rust on parts caused by contaminants
NW‑10C is a mildly alkaline, water-based preservation cleaner that combines cleaning and short-term protection. It removes oils, chlorides, and other contaminants, deactivates ionic contaminants, and leaves a residue that extends flash corrosion resistance. This product works in immersion, ultrasonic, and spray modes, and has a broad operating temperature range (approximately 77–140 °F / 25–60 °C). NW‑10C is also streak-free, low-odor, and helps enhance the performance of subsequent rust prevention coatings or VCI packaging.
NW‑12C is engineered for ultrasonic cleaning, delivering robust cleaning and corrosion protection even in challenging conditions. It removes oils, metalworking soils, and deactivates anionic contaminants while providing extended flash-rust inhibition (up to 72 hours under certain conditions). This cleaner is also usable in spray or immersion modes, making it versatile for hybrid systems. The product is streak-free, low-odor, and enhances the effectiveness of rust-preventive coatings or VCI packaging.
Selecting the Right Parts Washer Fluid
The effectiveness of your parts washing process depends on choosing the right cleaning chemistry. Learn how to evaluate soil types, metal compatibility, wash systems, and corrosion protection when selecting the best parts washer fluid for your operation.
Implementing an integrated cleaner-inhibitor solution offers significant advantages:
Prevents flash corrosion immediately after rinsing
Reduces rework caused by visible rust spots
Extends part life before protective coating or final assembly
Improves downstream process compatibility, including painting, coating, or packaging
Streamlines operations by eliminating the need for post-cleaning rust prevention steps
Tailored Solutions for Your Cleaning Process
Every facility has unique needs depending on alloy type, soil composition, cleaning method, and rust protection requirements. The ZERUST® AxxaWash™ line offers custom chemistries to meet specific production goals while minimizing the risk of flash rust and optimizing overall throughput.
Whether you’re operating spray washers, immersion tanks, or ultrasonic cleaning systems, ZERUST® has a solution engineered for your application.
See How ZERUST® Engineers Tailor Cleaning Solutions
Every cleaning process is different. Discover how ZERUST® engineers worked closely with a manufacturer to develop a customized AxxaWash™ solution that improved cleaning efficiency while preventing flash rust and protecting metal components throughout the process.
Don’t let corrosion undo your cleaning efforts. Choose ZERUST® AxxaWash™ products to degrease metal parts without the risk of flash rust.
Contact us today to speak with a ZERUST®/EXCOR® technical representative and find the right flash rust inhibitor cleaner for your operation.
Eliminate Flash Rust in Your Cleaning Process
Flash rust can quickly undo your cleaning efforts and lead to costly rework. ZERUST® corrosion experts
can help you select the right AxxaWash™ flash rust inhibitor cleaner for your metals, soils, and parts
washing system. Contact our team to discuss your application and get a customized corrosion prevention solution.
Tom White is the Marketing Manager at ZERUST®, bringing almost a decade of expertise in Vapor Corrosion Inhibitor (VCI) technologies and corrosion prevention solutions. He leads strategic marketing initiatives that showcase ZERUST®’s global product portfolio, from sustainable VCI packaging films to advanced rust preventatives and cleaners. Tom is deeply involved in product launches, trade show planning, digital marketing, and customer engagement, ensuring that ZERUST®’s innovative solutions reach the right industries and decision-makers. With a strong focus on aligning technical expertise with customer needs, he helps drive the brand’s growth and strengthen its position as a leader in corrosion protection worldwide.
ZERUST®/EXCOR® AxxaWash™ KF-123 is a low-foaming, mildly alkaline, high-performance water-based industrial parts washer that is designed for cleaning ferrous substrates. In addition, AxxaWash™ KF-123 provides flash-rust inhibition.
AxxaWash™ KMS-220 is a low foam, low temperature, mildly alkaline water-based part cleaner with excellent oil-splitting capabilities. In addition, AxxaWash™ KMS-220 provides flash-rust inhibition.
AxxaWash™ NW-10C is a mildly alkaline, water-based preservation cleaner with a wide range of operating temperatures. In addition to flash-rust inhibition, it also removes and deactivates sources of corrosion such as chlorides, oils, and contaminants.
AxxaWash™ NW-12C is a mildly alkaline, water-based ultrasonic cleaning solution with a wide range of operating temperatures. In addition, it can be used in immersion and spray cleaning modes.
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Degreasing metal parts is a critical step in most manufacturing and maintenance workflows. However, while removing oils and residues, many conventional degreasers expose metal surfaces to oxygen and moisture, creating the perfect environment for 
ZERUST® AxxaWash™ offers a proven line of aqueous-based flash rust inhibitor cleaners specifically engineered for industrial degreasing and short-term corrosion protection. These products are:
Implementing an integrated cleaner-inhibitor solution offers significant advantages:
