ISO 8501-1 (1988)

jmpkumara · 08-20-2011, 05:42 AM

ISO 8501-1

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Preparation of steel substrates before application of paints and related products -- Visual assessment of surface cleanliness -- Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings

Abstract

Identifies four levels of mill scale and rust that are commonly found on surfaces of uncoated steel. It also identifies certain degrees of visual cleanliness after surface preparation of uncoated steel surfaces and of steel surfaces after total removal of any previous coating. Are defined by written descriptions together with photographic examples.

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**joker™** · 08-20-2011, 09:39 AM

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ir_71 · (This post was last modified: 09-09-2011, 07:08 PM by ir_71.)

Dear friends,

this standard is replaced by newer edition.

ISO 8501-1:2007 Preparation of steel substrates before application of paints and related products —
Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings

This part of ISO 8501 specifies a series of rust grades and preparation grades of steel surfaces (see Clauses 2 and 3, respectively). The various grades are defined by written descriptions together with photographs that are representative examples within the tolerance for each grade as described in words.
It is applicable to hot-rolled steel surfaces prepared for painting by methods such as blast-cleaning, hand and power tool cleaning and flame cleaning, although these methods rarely lead to comparable results. Essentially, these methods are intended for hot-rolled steel, but blast-cleaning methods, in particular, could also be used on cold-rolled steel of sufficient thickness to withstand any deformation caused by the impact of the abrasive or the effects of power tool cleaning.
This part of ISO 8501 is applicable also to steel substrates that show residues of firmly adhering paint and other foreign matter (see Note 2 to 3.1) in addition to residual mill scale.
NOTE 1 The preparation grades of previously painted steel surfaces after only localized removal of paint coatings form the subject of ISO 8501-2 [1].
This part of ISO 8501 relates the cleanliness of the surface to its visual appearance. In many instances, this is sufficient for the purpose but for coatings likely to be exposed to severe environments, such as water immersion and continuous condensation conditions, consideration should be given to testing for soluble salts and other invisible contaminants on the visually clean surface by the physical and chemical methods which form the subjects of the various parts of ISO 8502 [2]. The roughness characteristics of the surface should also be considered by reference to the various parts of ISO 8503 [3].
NOTE 2 This part of ISO 8501 contains the text in two of the three official languages of ISO, English and French. It also contains the text in German, published under the responsibility of DIN, and the text in Swedish, published under the responsibility of SIS.

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ISO 8501-2:1994 Preparation of steel substrates before application of paints and related products -- Visual assessment of surface cleanliness -- Part 2: Preparation grades of previously coated steel substrates after localized removal of previous coatings

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ISO 8501-3:2006 Preparation of steel substrates before application of paints and related products -- Visual assessment of surface cleanliness -- Part 3: Preparation grades of welds, edges and other areas with surface imperfections:

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ISO 8501-4:2006 Preparation of steel substrates before application of paints and related products -- Visual assessment of surface cleanliness -- Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with high-pressure water jetting:

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ir_71 · 04-04-2014, 04:06 AM

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andersen3 · 01-25-2017, 02:18 PM

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