Protective Materials and Coatings - Fields of application
Legend
01 Galvanization (Sendzimir method) - UNI EN 10346
03 Hot dip galvanizing - UNI EN ISO 1461
11 Powder painting - Grey RAL 7032 - UNI EN ISO 12944-1
15 Powder painting - RAL 5015 - UNI EN ISO 12944-1
25 Electrogalvanization - DIN 50961
40 Stainless steel AISI 304 - UNI EN 10088
41 Stainless steel - AISI 316L - UNI EN 10088
45 “Peraluman” aluminium - EN 573-3 - EN 485-2/3
47 Geomet® 321
73 Stainless steel AISI 430 - UNI EN 10088
75 Stainless steel AISI 430- Tk. of 1.50 mm.- UNI EN 10088
76 Magnelis ZM 310 - SS-EN ISO 12944-2
Resistance
Excellent resistance
Good resistance
No resistance
Application Coating
01
03
15
11
25
40
41
73
75
47
76
Indoor installation, normal environment
Outdoor installation, normal environment
Marine environment
Sulphurous aggressive (low concentration)
Chemical industries, nitrate explosives, photography, furnishing
Acid environment
Alkaline environment
Halogen environment (fluorine-chlorine)
Foodstuffs environment
01
Galvanization (Sendzimir method)

For zinc plating cold-rolled steel strips. After normalising the steel and through preparation of its surfaces, complete adhesion of the zinc to the basic metal is
achieved and a very thin uniform layer of iron-zinc alloy is formed.
The result is that plastic machining operations can be carried out on the material without the removal or flaking of its coating. Anti corrosion protection is also ensured
in places where the metal is cut, as the zinc acts as an anode, solubilising into zinc oxide, protecting the steel base
Metal coating: min. 200g/mq - 14micron max. 275g/mq - 16micron

03
Hot dip galvanizing

The hot dip galvanizing process consists in dipping the steel into a tank of molten zinc at a temperature of about 450° C, after its surface has been appropriately
prepared, to trigger the Zn-Fe reaction and the series alloy phases that form the coating, which is usually 50-60 microns thick.
After processing, the ZAMET S.p.A. hot-dip galvanized products are manufactured in compliance with UNI EN ISO 1461 standards. Once the zinc plating
process is complete, a white film forms over time; this natural phenomenon is caused by the reaction between oxygen and the surface layer of zinc, and does
not compromise resistance to corrosion.
If the material remains inside the packaging for a long time, the presence of the white film may be accentuated due to the formation of condensation and
the lack of aeration between the surfaces in contact. Under UNI EN ISO 1461 and all the main international standards, this oxidation phenomenon cannot be
considered as grounds for contention or for rejection.
Although not required to do so, in order to supply a high quality product,ZAMET S.p.A subjects its products to an additional passivation treatment
to delay the formation of oxidation.

Minimum coating masses (in relation to the thickness) on non-centrifuged samples

Item and its thickness

Local coating (min) (a)

Average coating (min) (b)

g/m2

µm

g/m2

µm

Steel >6 mm

505

70

610

85

Steel >3 mm up to ≤6 mm

395

55

505

70

Steel 1.5 mm up to ≤3 mm

325

45

395

55

Steel <1.5 mm

250

35

325

45

Iron castings ≥6 mm

505

70

575

80

Iron castings <6 mm

430

60

505

70

The table is for general use, regulations for the single products may include different requirements, comprising various thickness categories. A requirement may be added for thicker coatings or for additionally requisites, without influencing conformity to this standard.
(a) Local mass of the coating: value of the coating mass obtained through a single gravimetric test.
(b) Average mass of the coating: average value of the coating masses determined through either the use of a control sample or by conversion of the average coating thickness (see point 5 of the relevant standard).

11
Powder painting - Grey RAL 7032

Coating carried out with one type of powder paint: EPOXY POLYESTER
Colour:

  • Electric blue - RAL 5015
  • Grey RAL 7032
  • other colours by request.

Average thickness of coat: 60 microns.
The material is phosphated and then coated electrostatically with epoxy polyester resin before being placed in an oven, where the reticulation process takes
place. This treatment provides excellent resistance to chemical agents. Powder painting is always carried out on Sendzimir galvanized materials.

Mechanical properties EPOXY POLYESTER

Pencil hardness H-2H
Erichsen cupping test DIN 53156 8 mm
Chequering test DIN 53151 Gt. 0
Gardner impact test 100 kg/cm
Bending over tapered spindle ASTM D 522 4 mm

Stability tests

Salt mist test ASTM B 117 500 hours
Resistance to weathering QUV Panel 100 hours

15
Powder painting - Blue RAL 5015

Coating carried out with one type of powder paint: EPOXY POLYESTER
Colour:

  • Electric blue - RAL 5015
  • Grey RAL 7032
  • other colours by request.

Average thickness of coat: 60 microns.
The material is phosphated and then coated electrostatically with epoxy polyester resin before being placed in an oven, where the reticulation process takes
place. This treatment provides excellent resistance to chemical agents. Powder painting is always carried out on Sendzimir galvanized materials.

Mechanical properties EPOXY POLYESTER

Pencil hardness H-2H
Erichsen cupping test DIN 53156 8 mm
Chequering test DIN 53151 Gt. 0
Gardner impact test 100 kg/cm
Bending over tapered spindle ASTM D 522 4 mm

Stability tests

Salt mist test ASTM B 117 500 hours
Resistance to weathering QUV Panel 100 hours

25
Electrogalvanization

The zinc coat is deposited on steel by electrolysis.
The bath used is an acid or alkaline solution of zinc salts: the anodes are made of zinc (generally pure to
99.99%), the cathodes are the pieces to be plated, following degreasing and pickling (DIN 50961 standard - 7 microns galvanized white).

40
Stainless steel AISI 304

AISI 304 - Cr-Ni steel with low percentage of C, austenitic, not hardenable, corrosion-resistant. Non-magnetic when annealed, slightly magnetic when cold
processed. Good weldability and fairly good resistance to intercrystalline corrosion.
Excellent toughness up to very low temperatures.
X5CrNi18-10 • D no. 1.4301• Pmax = 0.045 • C ≤ 0.07 • Si ≤ 1.0 • Mn ≤ 2.0 S ≤ 0.015 • N ≤ 0.11 • Cr 17.5 to 19.5 • Ni 8.0 to 10.5

41
Stainless steel AISI 316L

AISI 316L - Excellent corrosion resistance in atmosphere and in a wide variety of salts, organic acids and foodstuffs, discreet with regard to weak acid reductant solutions, better than other austenitic steels that do not contain Mo, in
relation to halides and sea water.
X5CrNiMo17-12-2 • D.no. 1.4401 • Pmax = 0.045 • C ≤ 0.07 • Si ≤ 1.0 • Mn ≤ 2.0 S≤ 0.015 • N ≤ 0.11 • Cr 16.5 to 18.5 • Mo 2.0 to 2.5 • Ni 10.0 to 13.0

45
"Peraluman" aluminium

5454, 5754 (used by Zamet) and 5154A alloys with 2.5 to 4% magnesium, with lower manganese and chromium additions, are commonly used in building, construction sites, industrial and civil vehicles, mechanical industry.
5154A alloy is commonly used to make rivets and in very fine wire for the manufacture of mosquito nets and coaxial wires.

47
Geomet® 321

Geomet® 321 is a thin, aluminium grey-coloured, non-electrolytic coating, for protecting articles in steel, cast iron or other ferrous metals from corrosion. Geomet® 321 is made up of zinc and aluminium foils in an inorganic matrix; it was developed by Dacral, the manufacturer of DACROMET® 320, as a 100% chromium-free alternative. The application of Geomet® 321 does not generate embrittlement due to hydrogen. The process used is cold dipping in an aqueous dispersion or spraying.

73
Stainless steel AISI 430

AISI 430 is doubtlessly the most common type of ferritic steel and the most used; it is easy to process when cold, with a lower hardening level than austenitic steels.
It has good corrosion resistance characteristics (lower than austenitic steels) both at ambient temperature and at higher temperatures, and resists heat and dry sulphurous gases.
Used in the automobile, household appliance and chemical industries.

75
Stainless steel AISI 430 - Tk of 1,50 mm.

L’AISI 430 est sans aucun doute le type d’acier ferritique le plus répandu et le plus employé ; facile à travailler à froid, il présente un écrouissage inférieur à celui des aciers austénitiques.
Il possède de bonnes caractéristiques de résistance à la corrosion (inférieure à celle des aciers austénitiques) aussi bien à la température ambiante qu’aux températures plus élevées et il résiste à la chaleur et aux gaz sulfureux secs.
Employé dans l’industrie automobile, dans l’électroménager et dans l’industrie chimique.

76
Magnelis ZM 310

Magnelis ® coating, the alternative for the harshest environments that guarantees:
- Cost-effectiveness to the post-galvanized process
- A corrosion resistance performance up to 10 times better than Sendzimir galvanised steel
- An excellent solution for a wide range of applications

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