Aluminum Alloy Sacrificial Anode

Aluminum Alloy Sacrificial Anode

1. Description

Aluminum alloy sacrificial anodes are a type of cathodic protection system used to protect metal structures from corrosion. They are typically made of a high-purity aluminum alloy, and are designed to corrode preferentially to the metal structure they are protecting.

The principle behind cathodic protection is that when two different metals are in contact with each other in an electrolyte (such as seawater), they form a galvanic cell. The metal with the lower electrode potential (more reactive) becomes the anode and corrodes, while the metal with the higher electrode potential (less reactive) becomes the cathode and is protected from corrosion.

2. The specification of aluminum-zinc-indium aAlloy sSacrificial anode

Alloy type	Zn	In	Cd	Sn	Mg	Si	Ti	Impurity, no more than			Al
								Si	Fe	Cu
Al-Zn-In-Sd	2.5-4.5	0.018-0.050	0.005-0.020	-	-	-	-	0.10	0.15	0.01	Margin
Al-Zn-In-Sn	2.2-5.2	0.020-0.045	-	0.018-0.035	-	-	-	0.10	0.15	0.01	Margin
Al-Zn-In-Si	5.5-7.0	0.025-0.035	-	-	-	0.10-0.15	-	0.10	0.15	0.01	Margin
Al-Zn-In-Sn-Mg	2.5-4.0	0.020-0.050	-	0.025-0.075	0.50-1.00	-	-	0.10	0.15	0.01	Margin
Al-Zn-In-Mg-Ti	4.0-7.0	0.020-0.050	-	-	0.50-1.50	-	0.01-0.08	0.10	0.15	0.01	Margin

Model	Specification /mm	Weight / kg
	A×（B1+B2）×C
AI-1	2300×（220+240）×230	310.0
AI-2	1600×（200+210）×220	190.0
AI-3	1500×（170+200）×180	130.0
AI-4	900×（150+170）×160	58.0
AI-5	1500×（148+178）×170	120.0
AI-6	850×（180+220）×180	85.0
AI-7	800×（200+280）×150	80.0
AI-8	700×（160+220）×180	72.5
AI-9	1250×（115+135）×130	56.0
AI-10	1000×（115+135）×130	46.0
AI-11	750×（115+135）×130	35.0

Inner diameter × width × thickness × gap (mm)	Weight (Kg/pair)	Core specification (mm)
Φ1020×200×35×51	68	5×50
Φ819×60×30×51	13	5×25
Φ624×80×30×51	17	5×50
Φ513×100×30×51	17	5×50
Φ487×200×45×51	41	5×50
Φ470×480×25×51	50	5×50
Φ436×480×38×51	70	5×50
Φ420×413×45×51	69	5×50
Φ385×150×59×51	32	5×50
Φ335×505×38×51	56	5×50
Φ280×250×45×51	29	5×50
Φ252×250×45×51	26	5×50

Model	Specification/mm	Weight/ kg
	A×（B1+B2）×C
AT-1	500×（115+135）×130	23.0
AT-2	1500×（65+75）×70	21.5
AT-3	500×（110+130）×120	20.0
AT-4	1000×（58.5+78.5）×68	13.2
AT-5	800×（56+74）×65	10.0
AT-6	1150×（48+54）×51	9.0
AT-7	250×（80+100）×85	5.0
AT-8	200×（70+90）×70	3.0

7. Aluminum alloy anode specifications for seawater cooling water systems