Options compared
| Option | Where it suits | Watch for |
|---|---|---|
| Bare, dry packaging | Short transit and fast use | Rust marks if packaging gets wet |
| Light oil film | Medium storage | Handling mess; oil on bolting faces |
| Paint on non-working faces | Long storage, appearance | Paint on bolt faces or in holes can hold the edge off the moldboard |
| Wax or similar coating | Long sea freight | Removal before fitting; ask the supplier |
| Desiccant and wrapped packaging | Humid routes | Torn wrap lets moisture in |
What salt-spray tests tell you
ASTM B117 is a practice for operating salt spray apparatus. The ASTM page I read on 24 October 2026 says that prediction of performance in natural environments has seldom been correlated with salt spray results when used as stand-alone data. So a supplier’s salt spray hours are a comparison tool at most, and not a promise of storage life.
What to ask the supplier
Transit corrosion is invisible until the edge is on the plow, so the questions belong in the order, not in the claim.
- What coating, if any, is on the edge, and which surfaces? A coated face with a bare bolt face is a deliberate choice worth asking about.
- Is the bolt face and hole left clean? Paint in a bolt face changes the seating and the torque.
- How is it packaged against moisture, and for how long? Sea freight is the case that matters.
- Is a test cited, with its standard and conditions? Salt-spray hours mean little without the standard.
On receipt
Transit damage is easiest to prove in the first hour, not in the first week.
- Open one pallet and look for rust or wet wrap.
- Check the bolt faces and holes for paint or residue.
- Photograph and report problems before you accept the goods.
Limits
I give no storage life. Your climate and storage conditions decide how much protection is reasonable.
Storage after receipt
Protection in transit is only the first stage. Edges that go on a shelf for months face the real test, which is your own storage room. Keep them off the floor, away from doors and from salt or brine, wrapped and labelled with the receipt date. Check a sample every month in the first season and record what you see, so that next year you can order the protection you need instead of the protection you fear.
Boundary: No corrosion rate or storage life is given; the ASTM store page was read, not the full standard, and salt-spray results are a comparison tool at best.
Sources and further reading. External references are dated; where a figure is quoted, the link shows where it came from.
ASTM International: ASTM B117-26a Standard Practice for Operating Salt Spray (Fog) Apparatus (store page: scope and significance) (B117-26a, updated Sep 22, 2026) ↗Our measurement stops at the paint surface. Does the drawing need to say whether coating is included? ↗Hardware Corrosion and Seizing on Plow Blades: Prevention Practice ↗Sourcing carbide wear parts guide ↗Why Plow Bolts Break: Keep, Photograph and Report the Evidence ↗Anti-Seize on Plow Bolts: It Helps Removal and Changes the Torque Question ↗Ceramic-Insert Blades: Why Agency Reports Were Mixed ↗
