Erosion-corrosion resistance

Erosion corrosion is the phenomenon of decreacing wall thickness in plumbing components.
The typical case of this phenomenon can be found in bending portions of plumbing such as elbows and tees.
NEXTBRASS has achieved excellent erosion corrosion resistance in brass by adding Tin.
Please see result of the accelerated test as follows.

Test Method

C49355 Wrought products

C89720 Casting products

Dezincification resistance

NEXTBRASS also has achieved excellent dezicification resistance.
The result of test was less than 200 μm.
Please see result of the accelerated test as follows.

Test Method : According to ISO6509-1981
C49355 Wrought products	C89720 Casting products

Susceptibility to Stress corrosion cracking

The taper screw combination as shown in the photograph. It's tighten constant torque and be exposed ammonia atmosphere. Then we checked the presence or absence of cracks that is observed visually or microscopic at the specific time.

<TEST RESULT> C49355 Wrought products

Extruded rod for forging of NEXTBRASS has excellent resistance to stress corrosion cracking than common brass.

C89720 Casting products

Compared with C85700 (CAC203) which cracked in 8 hours. there is no cracking after 312 hours in any NEXTBRASS.