The ZBA    zinc alloy anodes are cast to internationally recognized U.S.Military Specification MIL- 18001-K using only special high grade zinc ingot of minimum purity 99.995% with small additions of special alloy elements. This alloy is also covered by ASTM-418-95 Type I.
Our Sacrificial Zinc Anodes have stable electrochemical properties and are used in seawater or in water up to 1000 ohm-cm.They should not be used where environmental temperature may exceed   120 degrees F. ( 50° C  )

Requirements For Chemical Composition Limits

ASTM B 418 TYPE I                                 ASTM B 418 TYPE II
   MIL – A – 18001-K

Fe  0.005 %  Max                                         Fe  0.0014 %  Max

Pb  0.006 % Max                                          Pb  0.003 %   Max

Cu 0.005 % Max                                           Cu 0.002 %   Max

Al 0.1 – 0.5 %                                               Al   0.005 %   Max

Cd 0.025 – 0.07 %                                        Cd 0.003 %   Max

Zn   Remainder                                               Zn   Remainder

 
Open circuit potential
( VS  Ag / AgCl ref. cell )                                    -1.03 volt


Electrochemical capacity in seawater                  780 Amp.hr / kg

 Efficiency                                                                95 %