Water Soluble Corrosion Inhibitor P200

Metalworking fluid formulators and machinery maintenance factories constantly seek eco-friendly, nitrite-free water based rust additives that deliver stable ferrous metal protection without toxic nitrite ingredients. Traditional nitrite-containing water soluble corrosion inhibitors face strict export environmental restrictions, while many low-grade water-based anti-rust agents fail in hard water or leave stubborn residues on precision parts.

RLT-P200 nitrite-free water soluble corrosion inhibitor is specially engineered for carbon steel, cast iron and alloy steel anti-corrosion treatment. It features full miscibility with pure water at any mixing ratio and forms crystal-clear diluted solutions. Even under low working concentration, this ferrous metal flash rust preventive additive provides long-lasting passivation protection for semi-finished and finished iron components during machining production and equipment maintenance cycles.

Product Advantages

1. Powerful anti-rust performance at low mixing concentration

   This water soluble corrosion inhibitor achieves Grade 0 zero-rust standard for cast iron at only 3% dilution, forming a compact passive film to block oxygen and moisture erosion for all ferrous metal substrates.

2. Unlimited water miscibility, transparent diluted solution

   100% water-soluble formula mixes with water in any proportion without stratification, turbidity or sediment; 1% aqueous solution stays fully colorless transparent, no impact on the appearance of finished water-based MetalWorking Fluids.

3. Ultra-low residue, easy post-workpiece cleaning

   After anti-rust treatment, the thin protective film can be fully removed by either water-based industrial cleaners or solvent degreasers, eliminating residual film interference for subsequent welding, coating or assembly processes.

4. Excellent hard water compatibility, stable performance in variable water quality

   Unlike ordinary water based rust preventive additives that fail in high-hardness tap water, RLT-P200 maintains consistent anti-corrosion effect without calcium/magnesium salt precipitation, suitable for factories without deionized water supply.

5. Eco-friendly formula, convenient waste liquid disposal

   100% nitrite-free composition (non-detectable nitrite content) complies with global industrial chemical export regulations; waste diluted liquid requires no complicated hazardous waste treatment, cutting factory wastewater processing costs greatly.

Typical Physical & Chemical Performance

Main Application Fields

As a multi-purpose water soluble corrosion inhibitor, RLT-P200 can be directly added or pre-formulated into all mainstream water-based industrial fluid systems:

1. Fully synthetic & semi-synthetic metalworking fluids (MWF)

2. Machining emulsions, grinding & cutting solutions (tank-side direct top-up additive)

3. High-water-content HFC hydraulic anti-rust fluids

4. Concentrated water-based industrial metal cleaning agents

5. Ready-to-use aqueous degreasing & anti-rust one-step cleaners (on-site tank blending)

Application Scenarios

1. Inter-process Temporary Anti-Rust for CNC Machined Ferrous Parts

Suitable for carbon steel, cast iron and alloy steel semi-finished blanks between cutting, grinding and tapping processes. Immersion or spray treatment creates instant passivation film to avoid flash rust during workshop turnover, compatible with synthetic cutting fluid circulation tanks.

2. Long-Term Storage Protection for Finished Iron Hardware Components

3%–5% diluted RLT-P200 delivers stable indoor rust resistance for stamped steel parts, cast machinery housings and shaft workpieces, low residue film leaves clean surface for later surface finishing.

3. Additive for Formulating Synthetic & Semi-Synthetic Cutting Fluids

This nitrite-free water soluble corrosion inhibitor is the core anti-rust raw material for water-based metalworking fluid manufacturers, solves flash rust failure problems on cast iron workpieces after machining.

4. Anti-Corrosion Additive for Water-Based Degreasing Cleaners

Blend into concentrated aqueous metal cleaners to realize one-step degreasing + temporary anti-rust function, ideal for auto parts stamping factories and hardware polishing workshops.

5. Anti-Rust Auxiliary for HFC High-Water Hydraulic Fluids

Add to water-glycol hydraulic fluid to protect steel hydraulic valves, pipelines and cylinder bodies from internal corrosion under long machine running cycles.

6. Equipment Maintenance Temporary Rust Prevention

For machine tool guide rails, cast iron fixtures and steel molds during production line shutdown, simple spray anti-rust treatment without heavy oil residue.

Compatible Metal Substrates

Carbon steel, grey cast iron, alloy steel and all other ferrous metal materials; not recommended for copper, aluminum non-ferrous metals.

Standard Operating Instructions

• Working Concentration: Standard dilution proportion 3 wt%–5 wt%; increase dosage appropriately if longer anti-rust storage cycle is required.

• Operating Temperature: Usable under normal ambient temperature; mild heating accelerates surface drying, avoid boiling to prevent solution concentration deviation.

• Two Standard Treatment Processes

  (1) Immersion Method: Fully submerge workpieces for 2–5 minutes to form uniform passivation film.

  (2) Spraying Method: Complete even surface coverage, minimum spray contact time 2 minutes.

• Pre-treatment Mandatory Step: Remove all surface rust, oil stains and scale before anti-rust treatment; residual contaminants will severely weaken corrosion inhibition performance.

• Post-treatment Drying Process: Air-dry naturally or low-temperature bake parts to form dense, stable passive anti-rust film.

• Post-storage Protection Rule: Isolate treated metal parts from rainwater, sewage and other external liquid pollution to prevent protective film failure.

Frequently Asked Questions

Q1: What is the biggest environmental advantage of RLT-P200 water soluble corrosion inhibitor?

A1: It is 100% nitrite-free with non-detectable nitrite content, fully compliant with global metalworking fluid export environmental standards, and waste liquid treatment is far simpler than traditional nitrite-based rust preventive additives.

Q2: What is the recommended working dilution ratio of this ferrous metal flash rust additive?

A2: The standard working concentration is 3 wt% to 5 wt%. Adjust dosage higher if you need extended indoor storage anti-corrosion lifespan for cast iron and steel parts.

Q3: Can RLT-P200 be added directly into synthetic metalworking fluid circulation tanks?

A3: Yes. This water soluble corrosion inhibitor supports tank-side direct top-up or pre-formulation into synthetic & semi-synthetic cutting fluids to eliminate workpiece flash rust after machining.

Q4: Does RLT-P200 still work in high-hardness industrial tap water?

A4: Absolutely. It has excellent hard water compatibility, no salt precipitation or anti-rust performance attenuation even when diluted with unsoftened factory tap water.

Q5: Will residual film left by RLT-P200 affect subsequent welding or coating processes?

A5: No. The ultra-thin passive film leaves almost no residue and can be fully cleaned off by regular water-based or solvent degreasers before secondary surface processing.