Surface treatment

The treatment and finishing of surfaces of metal parts contributes to their protection and optimization. Whether semi-finisihed product or component, Wieland has a solution.

Every application has individual requirements - also with regard to the surface. We offer both standards, such as roughness or protective coating, but also special qualities or tin plating. However, our expertise also includes organoceramic thin films that meet different requirements through targeted modification with high-tech materials.

Our range of products

Our surface treatment at a glance.

Our complete product range

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Surfaces and coatings for rolled products

We manufacture our products both bare and coated on our own systems. Also, rolled products can be delivered dry or oiled. For improved resistance to oxidation, our products are passivated as standard.

Materials

Sheets and strips may be provided with a protective film of PE that protects the surfaces against mechanical damage during downstream machining processes. The film is attached with an acrylic adhesive and can be drawn off after processing.

Sizes of strip with a protective coating
Thickness (mm)	Width (mm)	Coating
0,3 - 2,0	30 - 700	single- or double-sided

Sizes of sheet with protective coating
Thickness (mm)	Width (mm)	Length (mm)	Coating
0,3 - 1,0	500 - 800	500 - 3.000	single- or double-sided
1,0 - 10,0	500 - 1.250	500 - 4.000	single- or double-sided

Sizes of strip cut to length with protective coating
Thickness (mm)	Width (mm)	Length (mm)	Coating
0,3 - 1,0	150 - 500	700 - 2.500	single-sided
1,0 - 10,0	20 - 500	200 - 4.000	single-sided

In electrical and electronic applications, contact resistance plays a crucial role. The formation of oxide layers can compromise this severely and may cause contact failure. As a rule, therefore, at least the contact zones are coated. The most common coatings are of tin or tin alloys. Our products are treated on ultra modern hot dip tinning plant. A range of tin plated variants are possible, depending on the customer’s requirements.

Further Details

We can also offer strips with full or selective silver or nickel plating. These strips you can purchase directly from us as a single source. They are finished at external partner companies.

The surface quality depends greatly on the roughness. We offer the following roughnesses as standard:

	Maximum value Special tolerance (µm)		Maximum value Special tolerance I (µm)		Maximum value Special tolerance II (µm)
Thickness (mm)	Ra	Rmax	Ra	Rmax	Ra	Rmax
0.1 - 0.4	0.25	2	0.18	1.4	0.13	1
0.4 - 1.0	0.25	2	0.2	1.6	0.18	1.4
1.0 - 1.5	0.5	2	-	-	0.2	1.6
1,5 - 3,0	0,3	3	*	*	*	*

Modification possible due to alloy or thickness

If you wish the end products to fulfil high visual requirements, we can offer you a range of special qualities to choose from:

for mirror finishing
for electrolytic polishing
for etching
bright rolled
mirror finish rolled
free of flow lines

These special products set certain restrictions on the range of geometries. Our experts will be pleased to advise you on the surface qualities best fulfilling your requirements.

Characteristics and properties of products / materials in this document are generic and provided solely for general information purposes. Any statement regarding the suitability of products / materials for certain types of applications is based on typical requirements and does not replace expert advice. Wieland disclaims all liability arising from any reliance on these documents.

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