For immersion and circulation pickling.

Avesta Pickling Bath 302 is a concentrate that should be diluted with water depending on the stainless steel grade.

Standard applications

• The pickling bath restores stainless steel surfaces that have been damaged during fabrication operations such as welding, forming, cutting and blasting. It removes weld oxides, the underlying chromium-depleted layer and other defects that may cause local corrosion. Avesta Pickling Bath 302 is recommended for immersion pickling of small objects and for pickling surfaces that are time-consuming to brush or spray pickle. It can also be used for circulation pickling of pipe systems.

Features

1. An efficient, economical and strong concentrate , the 302 can be diluted 1 part of acid to 3 parts of water (25kg of conc 302 will give 100kg ready to use product) for immersion pickling of steel grade 304 (1.4301)
   compared to 1 part of acid to 1 part of water 1 for standard pickling bath products (25kg of standard conc product will give only 50kg ready to use product)
2. Working life; the bath fluid is consumed during usage and the effective working life of the bath fluid is determined by the amount of acids and dissolved metals. The bath fluid should hence be analyzed regularly, and new acid should be added when needed in order to obtain an optimal pickling result. We may assist with this analysis service, see also Product Information Data Sheet concerning Avesta Pickling Bath Services.

Packaging

Avesta Pickling Bath 302 is supplied in 33kg and 240kg polyethylene containers or 1200 kg IBC polyethylene containers. Availability of different packages sizes may differ between markets. All packing material follows the UN regulations for hazardous goods.

Storage

Avesta Pickling Bath 302 should be stored indoors at room temperature. Containers must be kept properly closed, in an upright position and inaccessible to unauthorized persons. The product is perishable and should not be kept in storage longer than necessary. It has a maximum shelf life of two years when stored at room temperature. Exposure to higher temperatures (>35°C) may damage the product and reduce the shelf life.

Waste treatment

The wastewater produced when pickling contains acids and should be treated with Avesta Neutraliser 502 or with slaked lime to a pH-value of 7-10 before discharge. Heavy metals from stainless steel are precipitated as a sludge, and should be sent for deposition according to local regulations. Empty containers (HDPE) must be cleaned and can then be recycled according to local regulations.