DACROTIZED treatment developed Diamond Shamrock gives (anticorrosive film having both self-restoring function and sacrificial corrosion preventive function) to metal products， of which performance is superior to that of galvanizing. Owing to its excellent anticorrosive performance, it is used widely in various automotive parts，electric household appliances，building and civil engineering materials，etc. Low torque coefficient type is also available upon request.
|iItems||Test method||Test result|
|Salt spray test||JIS Z 2371||1,000 hours|
|Torque coefficient||Standards||JIS B 1186||0.2〜0.3※1|
By basket type dip-spin coating method, a film of excellent throwing power is formed.
Applications and Available sizes
Automotive parts，electric household appliances, building and civil engineering parts.
|Coatable materials||Carbon steel of all grades, structural alloy steel|
|size||nominal diameterr : 8mm or morestandard maximum dimensions : W500×L600×H100standard maximum weight : 30kg per itemsize other than the above size, please cotact to us.|
In high voltage atmosphere，products having high insulating performance are needed. Takenaka have succeeded in development of bolts having high insulation and high corrosion resistance by combination of various anticorrosive bolts and insulating materials (insulation sleeve and insulation washer). Anticorrosive bolts are selectable from TAKECOATⓇ-1000， TAKECOATⓇ-CERAMIC1，and DACROTIZED depending on the required anticorrosive performance. Applicable to all materials， including double-ended bolts and hexagon bolts.
●Dimension of insulation washer
- Dimension of L differs according to the type of flange or combination.
- Bolt shape can be selected from double-ended bolt and hexagon bolt.
- Consult us for other size(e.g. over M30 and inch thread).
- Hexagon nut conforms to attachment to JIS B 1181 and steel washer conforms to bright round and plain round type of JIS B 1256.
●Characteristic of insulation sleeve and insulation washer
|Insulation Tube||Insulation washer|
|Material||Fluorocarbon polymer||Silicone rubber||Ethylene-propylene rubber||FRP|
|Volume resistance（Ω・cm)||1018 or more||2×1015 or more||2×1015 or more||1011〜1015|
|Dielectric strength（kV/mm)||40||25||25||10 or more|
|Dielectric constant||2.1 or less||3.2||3.3||3.5〜4.5|
|Standard color||Transparent||Light gray||Black||-|
|Standard thickness（mm)||0.5||1.0||0.5||4 or 6|