Products
Geomet®
dacrotized®
Outline
Effective in preventing galvanic corrosion
Heat-resisting and Corrosion-resisting surface treatment
Point01Ideal for fastening aluminum products
Contact with dissimilar metals or alloys that have different electrode potentials normally causes contact corrosion of dissimilar metals (galvanic corrosion). Geomet® and Dacrotized®, due to their controlled protective zinc layer, which delays corrosion by sacrificing the zinc layer first, provides a long-lasting protective effect on aluminum.
Galvanic corrosion
Point02Excellent corrosion resistance
Due to the self-sacrificing protection effect of the metal flakes (zinc) of the film, the iron material underneath gets an excellent protection against rust.
Resistance
Point03Excellent heat resistance and corrosion resistance
Normal surface treatment is sensitive to heat and cannot resist corrosion in a high heat environment, but since our product does not contain water of crystallization or organic resin, it is less likely for heat deterioration to occur and thus can withstand high heat for a long time.
Resistant
Point04Does not cause hydrogen embrittlement
Since there is no pickling involved in the surface treatment process, there is no need for concern about hydrogen embrittlement.
Resistant
Tips
Is galvanic corrosion the same as electrolytic corrosion?
Galvanic corrosion, in other words, contact corrosion of dissimilar metals, is often referred to as “electrolytic corrosion.” Are these the same thing? Strictly speaking, electrolytic corrosion is what is called “stray current corrosion”, and has come to be called “electrolytic corrosion” for short. Dissimilar metal contact corrosion is a phenomenon in which contact points between different types of metals rust, and stray current corrosion is corrosion caused by a current (stray current) flowing into places it should not go. Be careful not to confuse the two.
Tips
Ideal for complying with overseas regulations.
Compatible with major regulations in Europe and the United States.
For all of those who export products to those countries.
Performance
Adoption Results
01AutomobileAutomobile
- Case:01Hub bolts
- Benefits：Rust prevention and hydrogen embrittlement countermeasure
- Case:02Suspension bolts
- Benefits：Rust prevention and hydrogen embrittlement countermeasure
- Case:03Filler pipe
- Benefits： Rust prevention and throwing power
- Case:04Hose band
- Benefits：Rust prevention, hydrogen embrittlement countermeasure, countermeasure against contact corrosion of dissimilar metals
- Case:05 Door striker
- Benefits：Rust prevention
- Case:06バッテリーボルト
- Benefits：Rust prevention and chemical resistance
02RailroadRailway
- Case:01Inner cylinder
- Benefits：Rust prevention
- Case:02Clip
- Benefits：Rust prevention and hydrogen embrittlement countermeasure
- Case:03 Plate spring
- Benefits：Rust prevention and hydrogen embrittlement countermeasure
03InfrastructurePublic
- Case:01Shield segment
(tunnel) - Benefits：Rust prevention and chemical resistance
- Case:02Overpass components (bridges)
- Benefits：Rust prevention
- Case:03Shaft (wind turbines)
- Benefits：Rust prevention
04Building constructionArchitecture
- Case:01 U-bolts
- Benefits：rust prevention and chemical-resistance
- Case:02Gas cock
- Benefits：Rust prevention
- Case:03Coil spring
- Benefits：Rust prevention and hydrogen embrittlement countermeasure
05OtherOther
- Case:01Bolts and nuts
- Case:02Pipes
- Case:03Plates and brackets
- Case:04 Springs
®is a registered trademark of NOF Metal Coatings Co., Ltd.