Home > Equipment maintenance > For corrosion prevention of metal materials Powder coating Rust Preventive Powder Coating > For corrosion prevention of metal materials Powder coating Rust Preventive Powder Coating ® 5000 (Support 5000)

Rust Preventive Powder Coating for preventing corrosion of metal materials

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Equipment corrodes in harsh environments such as along the coast or in hot spring areas.
Rust Preventive Powder Coating protects your equipment from corrosion!

Are you having trouble with metal equipment corroding in harsh environments such as salt-damaged areas near the coast, humid environments such as inside tunnels and dams, or environments exposed to sulfur gas such as hot spring areas or near volcanoes?

Zinc plating alone is not a sufficient anti-corrosion measure. In addition to reducing costs by extending the lifespan of equipment, measures are required that also take into account safety for the human body and the environment.
NTT Group's anti-corrosion powder paint Rust Preventive Powder Coating, which has a proven track record as a countermeasure against metal corrosion, will solve your problems.

  • Demonstrates excellent rust prevention ability even under severe corrosive conditions such as salt damage, volcanic gas, and hot spring gas.
  • Can be applied directly to galvanized surfaces (no primer required)
  • Highly adheres to the substrate and strongly protects the substrate for over 35 years *
  • Uses resin that is safe for the human body and does not contain VOC (volatile organic compounds), so it is friendly to people and the environment.
*The rust prevention maintenance period is a reference value calculated based on outdoor exposure test results (test piece with a coating film thickness of 300 μm). Performance will vary depending on the usage environment, so performance is not guaranteed.

Demonstrates anti-rust power even in environments near volcanoes! Outdoor exposure test on Miyakejima (after 11 years)

Photos of an exposure test using five galvanized steel plates. Only one piece (①) shows no rust.
① Rust Preventive Powder Coating ② Polyethylene ③ Thermosetting polyester ④ Hot-dip Zn plated steel plate ⑤ Zn-Al-Mg plated steel plate


The photo shows an outdoor exposure test on Miyakejima (after 11 years).
Galvanized steel sheets coated with Rust Preventive Powder Coating show no rust, even in the cross-cut areas. The "polyethylene paint," "thermosetting polyester paint," "galvanized steel sheet," and "Zn-Al-Mg-plated steel sheet" that were exposed at the same time were covered in red rust.

The testing site is close to the coast and is in a heavily salt-damaged area where, depending on the direction of the wind, it can be directly hit by sea spray. Furthermore, we experienced exposure to volcanic gas due to the eruption of Mt. Oyama in 2000. It can be seen that Rust Preventive Powder Coating exhibits extremely high rust prevention performance not only against salt damage but also against volcanic gas.
 

Various test results

Combined cycle corrosion test

These are the results of a combined cycle corrosion test in accordance with JIS K 5600-7-9:2006 (D method).

  • Test period: 1,320 cycles (330 days) of 6 hours per cycle (equivalent to over 10 years in outdoor environment)
  • Test piece: A test piece made of a hot-dip galvanized steel plate (150 x 70 x 3.2 mm equivalent to HDZT77) coated with Rust Preventive Powder Coating to a thickness of approximately 300 μm (with cross-cuts)
Diagram of cycle conditions. Repeat the following four conditions. Salt spray (50±10) g/l 30±2℃ 0.5 hours, wet 30±2℃ 95±3% RH 1.5 hours, hot air drying 50±2℃ 2.0 hours, hot air drying 30±2℃ 2.0 hours
Combined cycle corrosion test conditions
 
Combined cycle corrosion resistance test (A method) 330 days
Appearance of the test piece after 1,320 cycles (no abnormalities such as rust are observed in the cross-cut area)

Weather resistance test

  • Test equipment: Sunshine weather meter
  • Test time: 10,000 hours
  • Test conditions: Black panel temperature: 63±3℃, fresh water spray: Sprayed for 18 minutes during 120 minutes of UV irradiation

Photo of test piece
(Left) Rust Preventive Powder Coating (Center) Polyethylene (Right) Thermosetting polyester

Appearance of each test piece after testing
Rust Preventive Powder Coating specimen shows no discoloration or fading.

salt spray test

  • Test equipment: salt spray test machine
  • Exam time: 2,000 hours
  • Test pieces:
    ①Test piece of hot-dip galvanized steel plate (back side is blasted) coated with Rust Preventive Powder Coating to a thickness of approximately 300μm
    (There is a cross cut part on the surface)
    ②Hot-dip galvanized steel plate (back side is blasted)

Photo of a test piece coated with Rust Preventive Powder Coating with almost no rust visible
front
photograph
back
Photo of unpainted test piece with Rust Preventive Powder Coating, which has blisters due to red rust
front
photograph
back

① After salt spray test Rust Preventive Powder Coating Appearance of test piece
Although some white rust can be seen on the cross cut part,
No other abnormalities were observed.

② Appearance of hot-dip galvanized steel sheet after salt spray test
Blisters due to red rust can be seen on both sides.

Rust Preventive Powder Coating painting process

Since on-site painting is impossible, factory painting is mandatory. In the factory, you need a furnace that can heat the object above 300 ℃ and water cooling equipment. If you do not have them, please look for a Powder coating company which has the equipment.
The object to be painted does not necessarily have to be galvanized steel. Please contact us for available materials.

Rust Preventive Powder Coating painting process. Galvanized steel → Blasting treatment → Heating 280~350℃ → Painting (fluidized dipping method or electrostatic coating method) → Firing/cooling (water cooling) → Completion

Main performance

Image photo of powder coating Rust Preventive Powder Coating
item performance etc. Test method etc.
Initial coating performance Film thickness 250~350μm
smoothness Visual observation
Glossiness > 90% JIS K 5400 60° specular gloss
Hardness H~F pencil hardness method
impact resistance > 30kg・cm JIS K 5400
Adhesion >7MPa Adhesion test method
Environmental testing acid resistance No cracking or peeling abnormalities Soaked in 10% HCl aqueous solution for 30 days
Alkali resistance No cracking or peeling abnormalities Soaked in 10% NaOH aqueous solution for 30 days
salt fog resistance No abnormalities such as cracking, peeling, rusting, etc. JIS K 5400 2000 hours
accelerated weather resistance Color difference No abnormalities such as cracking, peeling, rusting, etc. JIS K 5400 2000 hours
50% gloss retention rate 500 hours
Glossiness
Outdoor exposure Color difference No abnormalities such as cracking, peeling, rusting, etc. 1 year exposure
50% gloss retention rate 1 year
Glossiness
*This performance is not a guaranteed value.

Application example

* Three colors are available: gray, dark brown, and white. "Dark brown and white" are made to order.
*The color of the anti-slip processing example is the color of the anti-slip material.
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steel pipe column
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Flexible protruding hardware band for utility poles
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Emergency phone storage box inside the tunnel
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guardrail
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erosion control dam
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manhole cover
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Outdoor stair steps (with anti-slip treatment)
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Rear step (with anti-slip treatment)
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Construction lining board (with anti-slip treatment)
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Expanded metal (with anti-slip treatment)

Examples with anti-slip processing are provided by Nakamura Densetsu Co., Ltd.
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High durability anticorrosive powder coating Rust Preventive Powder Coating ® 5000 Brochure 650KB

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