DIN 8.8 grade pure titanium hexagonal countersunk head bolts with
chrome plated.
Description
Titanium is a metal chemical element, chemical symbol Ti, atomic
number 22, located in the fourth period, IVB group in the periodic
table of chemical elements. It is a silver-white transition metal
characterized by light weight, high strength, metallic luster, and
resistance to wet chlorine corrosion. But titanium cannot be used
in dry chlorine. Even dry chlorine at a temperature below 0°C will
undergo a violent chemical reaction to form titanium tetrachloride,
which will then decompose to form titanium dichloride, or even
burn. Only when the water content in the chlorine gas is higher
than 0.5%, the titanium can maintain reliable stability in it.
The chromium plating layer has good chemical stability. It has no
effect in alkali, sulfide, nitric acid and most organic acids, but
it can be dissolved in hydrochloric acid (such as hydrochloric
acid) and hot sulfuric acid. In the visible light range, the
reflectivity of chromium is about 65%, which is between silver
(88%) and nickel (55%). Because chromium does not change color, it
can maintain its reflectivity for a long time and is better than
silver and nickel.
The main component of chromium plating bath is not metallic
chromium salt, but chromium's oxyacid-chromic acid, which is a
strong acid bath. In the electroplating process, the cathode
process is complicated, and most of the cathode current is consumed
in the two side reactions of hydrogen evolution and the reduction
of hexavalent chromium to trivalent chromium, so the cathode
current efficiency of chromium plating is very low (10%-18%). And
there are three abnormal phenomena: current efficiency decreases
with the increase of chromic anhydride concentration, l decreases
with the increase of temperature; and increases with the increase
of current density.
In the chromium plating bath, a certain amount of anions must be
added, such as SO42-, SiF62-, F-, etc., in order to realize the
normal deposition of metallic chromium.
The dispersing ability of the chromium plating solution is very
low. For parts with complex shapes, a pictorial anode or auxiliary
cathode is required to obtain a uniform chromium plating layer. The
requirements for hangers are also stricter.
| Material | Titanium |
| Surface Finish | Chrome plated |
| Usage | Automotive |
| Head type | Countersunk |
| Standard | DIN |
| Grade | 8.8 |
| Drawing Format | DWG/DXF/IGS/STEP/X-T and PDF |
| Certificate | ISO9001 |
| Service | OEM ODM Customised |
Factory pictures
Plating line
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